Lyra’s relief evaporates when she confirms it is the copy, not the real Hades. He places her hand over the butterfly carving in her pocket. The memory of it clears the Kykeon fog from her mind. He boosts her over the grain mound and out the door, but the grain buries him as it slams shut. Lyra bangs desperately on the sealed door before the illusion vanishes. Demeter announces the Lock is unsealed. Lyra sprints to Hades’s Lock and tries to open it, but the door remains sealed. Cronos explains that Hades’s copy both exists and does not exist simultaneously, leaving Lyra overwhelmed. She hugs Cronos, confessing she does not deserve their faith. Then Hades’s copy appears in the now-open doorway to his Lock, unharmed.

Hades’s copy scolds Lyra for nearly giving up in the silo and admits uncertainty about why he saved her, suggesting the Fates may have bound them. Boone appears, soaking wet, and reacts with hostility toward the copy. He is shocked to learn that days have passed, and he upset that she opened Demeter’s Lock without him (though he is evasive about his own disappearance, glancing at Persephone). A massive earthquake shakes the chamber. A vision seizes Phoebe, her body going rigid and levitating. When the vision ends, a pale, shaken Phoebe stares at Lyra and Boone and delivers her revelation: They are bound by a fated line.

Phoebe clarifies that the bond is not romantic, but she cannot see Boone’s future. The Titans regard Lyra with renewed hope, believing this timeline will finally succeed. Overwhelmed, Lyra questions whether the Titans are manipulating them and whether time resets are even real. Despite Cronos’s warnings that memories could reset her, Lyra asks Mnemosyne to show her images of past lives. Lyra sees her countless deaths in the Crucible and the Locks, repeated resets, and their various triggers. The memories cause immense pain. As Cronos yells for Mnemosyne to stop, broken time pulls Lyra away.

Lyra materializes in her old bedroom in the Order of Thieves’ den. She confirms the place is real and theorizes that broken time is taking her to moments where she can influence her own past. Remembering that her axe mysteriously appeared on her bed years ago, she decides to test this theory. She glamours the axe with instructions for it to remain with her past self until she learns to use it, then places it on the bed. Though reluctant to lose her only weapon, she understands her past self will need it. Broken time pulls her back to Tartarus. Cronos demands to know where her weapon is. Lyra holds out her half of the butterfly carving as a gesture of trust and tells him the axe is exactly where it needs to be.

Lyra and Boone successfully complete Poseidon’s Lock by climbing a glass cage in tandem. With four Locks unsealed, the bell chimes, and the door opens to the waiting Titans. Lyra yells for them to enter, but her returning powers temporarily incapacitate her. The delay proves catastrophic. The Pandemonium strikes Iapetus before half the Titans reach safety, and he transforms into a monstrous creature of lava and black crust, screaming and setting fire to everything he touches. When Iapetus spots Phoebe running for the Lock, he sprints to intercept her. Cronos orders the door closed, but Koios halts Hyperion to give Phoebe more time. Phoebe screams for them to protect Lyra and Boone, then Koios steps outside to face Iapetus with her. The door is sealed. Lyra hears Phoebe scream and sees golden blood splatter.

The survivors wait inside the sealed Lock for the danger to pass. A guilt-stricken Cronos blames himself. Cronos quietly asks Lyra about her fated bond with Boone, theorizing it could be a lifelong friendship, tied to a specific event, or that Boone might be a sacrifice. He reveals that all the Titan couples are fated soulmates, describing the feeling as filling a hollow place inside oneself—a description that reminds Lyra of Hades. Cronos adds that fate can be broken, though he has witnessed it only three times, each time with devastating consequences for the abandoned partner. He emphasizes that he is telling her this so that she knows she always has choices. When Lyra protests that she always ends up in Tartarus regardless, Cronos explains that this is because she consistently makes the same choices across timelines.

Persephone opens the Lock door. The group exits cautiously, observing a trail of golden blood from Iapetus’s rampage. Boone and Persephone have a tense, quiet exchange before he grabs her wrist and pulls her down a tunnel. The bell rings again, unexpectedly soon. Too far from the group to reach safety, Rhea orders Lyra to run for the closest Lock. Lyra sprints for Hades’s Lock, screaming for him to open the sealed door while fearing the Pandemonium will strike her at any moment. The door flies open to reveal Hades’s copy. She runs into his arms as the door slams shut.

Inside the Lock, Hades’s copy confirms he can see the Pandemonium—shapeless dark holes in another realm. When Lyra tells him the Titans are not monsters and that the real Hades was glamoured, he accuses her of lying and threatens to kill her to reset time. She challenges him to do it, but instead, he kisses her fiercely. An earthquake interrupts them. He reveals he enters hibernation periodically and, despite feeling the tremor, insists earthquakes are impossible in Tartarus—then abruptly vanishes, leaving Lyra alone.

When the Lock opens, Cronos and Rhea lead Lyra through the tunnels to a new hidden cell. Inside, they find the other Titans, Boone, and Persephone asleep. Iapetus is absent, and Phoebe is bandaged but alive. As Lyra tries to sleep, Persephone reveals that broken time has repeatedly taken her to Boone in the past. She pretended to be a thief to spend more time with him, culminating in a kiss and intimacy. However, after that encounter, time never brought her back to Boone again, and she inadvertently took the item he was trying to steal, leading him to believe she had manipulated him. Persephone also mentions that Boone recently saw her with Hades in the past and misinterpreted the incident, causing him to shut her out. Lyra advises Persephone to give Boone time and never lie to him.

Persephone explains that she and Lyra always become friends because they are opposites—Persephone lightens Lyra, and Lyra grounds Persephone. She also clarifies that her relationship with Hades was never romantic; her mother invented the pomegranate seed story to justify her desire to be in the Underworld. They fall asleep holding hands.

Lyra wakes to find a shimmering crack of broken time hovering above her. After silently communicating her intent to Persephone, who reluctantly releases her hand, Lyra reaches for the crack, and it envelops her. She arrives in Hades’s Olympus home, where he kneels at Persephone’s altar in despair, whispering that there is nothing more he can do. Lyra tells Hades that Persephone is not dead. He springs up and grabs her by the throat before recognizing her.

The narrative shifts to Hades’s perspective. He has not seen Lyra in centuries and has deliberately hardened his heart against her, convinced she is the catalyst for his prophecy to destroy the world. He forces himself to remain cold and tells her to leave. Lyra insists he listen for Persephone’s sake and reveals Persephone is trapped in Tartarus. She demonstrates knowledge she should not possess: that Pandora’s Box functions as both a key and a jar, and that only he can use it. Lyra insists that the only way Hades can save Persephone is to become King of the Gods by winning the Crucible Games. She gives him specific instructions: In the 21st century, wait at Zeus’s temple in San Francisco on Selection Night, stop a young woman from desecrating it, choose her as his champion, give her Persephone’s pearls, and give her a protective kiss. As Lyra begins to fade, Hades desperately tries to hold her. She kisses his cheek and whispers that he can trust her because she is his and always has been. Then she disappears.

Lyra returns to Tartarus, standing among the sleeping Titans, feeling utterly alone and convinced that the past Hades now hates her. She fears she has altered their future by interfering. Persephone takes her hand and quietly asks if she is okay. Lyra nods. She now understands the truth with certainty: she is the one “pulling [her] own strings” (319), attempting to orchestrate her past and shape her future. The fate of them all rests in her hands.

Several days later, Lyra, Boone, Cronos, Rhea, Mnemosyne, and Iapetus head toward Hera’s Lock while the others remain behind. Persephone refuses to accompany them, possibly to avoid distracting Boone. As they reach the bridge over the abyss, a crack of broken time opens behind Boone and freezes in place. A version of Lyra emerges with her throat fatally slit, blood spurting. Boone rushes to help, but the dying Lyra looks only at her present self. When Cronos guesses the connection of her appearance to Hera’s Lock, she nods and mouths the word “monsters” before collapsing. The time crack swallows her corpse, leaving only pooled blood that drips into the abyss. Hades’s voice calls out from below. Time freezes everyone, then restarts with a stutter.

The group waits in terrified silence for the Pandemonium bell, but it never rings. Cronos, visibly shaken, explains that time just completed a hard reset, with its starting point moved forward in the timeline. Only four such resets have ever occurred; the current loop began when Persephone first arrived in Tartarus. Boone, convinced Lyra cannot enter Hera’s Lock, turns invisible and tries to throw himself into the abyss. Rhea stops him with superhuman speed and extracts a promise not to try again. As the others depart, Lyra remains frozen on the bridge, consumed by guilt over whether her own actions caused the reset.

Cronos separates from the group and leads Lyra to a small, locked cell. He explains it is a safe place for what comes next. Lyra confesses her belief that she caused the hard reset. Cronos sits cross-legged on the floor and instructs her to do the same. He explains he will transport them into his mind for absolute privacy. Darkness envelops Lyra, followed by the sounds of children’s laughter and sea lions.

Lyra finds herself in a perfect mental projection of San Francisco’s Pier 39 with Cronos. He buys her pralines and cream ice cream, revealing that a past version of her mentioned it was her favorite. The idyllic scene moves Lyra to tears, as it mirrors a childhood fantasy about outings with her parents. She admits she distrusts his kindness, and Cronos acknowledges they have had this conversation before. Lyra explains her theory that she is manipulating her own past and that someone may be sending her to specific moments. Cronos says she has never influenced time on this scale before. He encourages her to view the hard reset positively—perhaps everything is finally aligned for escape. They return to the cell. Lyra tells Cronos she never imagined fulfilling her childhood fantasy with him. He admits he created the scene because he misses being a father. A new time crack appears, and Cronos encourages her to enter it. As Lyra steps through, she thinks she hears Cronos call her daughter. She arrives at Zeus’s temple on the night her human self first met Hades.

Hades waits at Zeus’s temple on the first night of the Crucible, feeling foolish for following instructions from a time-traveling Lyra he met 150 years prior. Seeing a woman with chin-length dark hair pick up a rock to hurl at the temple, he teleports and restrains her. The woman reveals that Zeus cursed her to be unlovable. Hades is baffled, as the curse should prevent him from liking her, yet it seems ineffective. When she turns around, he recognizes the woman as Lyra. However, she is afraid of him, with no memory of their shared past. Hades realizes this human Lyra is at her beginning.

Understanding that making Lyra his champion is key to rescuing Persephone, yet horrified at the thought of entering her into the deadly trials, he pretends not to know her. When he asks her name, Lyra lies, calling herself Felix Argos. Privately enraged at Zeus for the curse, he decides to let her go so he can think. As they part, he is tempted to kiss her but restrains himself, pushing her into the crowd. He then sees the future Lyra on the hill. She mouths for him to trust her before vanishing. Hades realizes he has no choice.

Lyra returns to Cronos in the cell, but another time crack immediately seizes her. She arrives in Hades’s water garden during Poseidon’s Labor—a moment she has visited before. Hades explains that a time-traveling Lyra just appeared, kissed him, and vanished an instant ago. Lyra realizes that Poseidon’s champion, Isabel, is about to die in the Crucible. She sends Hades to intervene, telling him to prevent a water dragon from biting Isabel or her past self. Hades teleports her to his rooms and locks her inside while he goes. The world freezes in a stuttering reset. When sensation returns, Lyra is back in Tartarus on the bridge immediately after her future self’s death. Boone is present and also remembers the erased timeline. Lyra confesses she caused the reset by attempting to save Isabel.

Lyra relives the water garden moment approximately 100 times, repeatedly failing to save Isabel. Any interference by her or Hades triggers another reset. After 50 attempts, the Titans limit her to 50 more tries. Eventually, she accepts that the new reset point prevents her from changing anything before it, which means she cannot save Meike, Neve, Dex, or any of her other fellow Crucible champions. Cronos confirms this truth must be felt through experience to sink in. In the final iteration, Lyra tells Hades not to interfere and to go be with her past self. She waits in his rooms while he goes to Olympus. He returns grim and confirms that Isabel died. Hades asks why Lyra would put herself through the Crucible. She says it must happen and assures him she will win and he will become King of the Gods. He says he only cares about her surviving. He leaves, locking the door, and Lyra remains, knowing she cannot change what has passed.

After a sleepless night in Hades’s rooms, a time crack takes Lyra to a sea cave where Oceanus, the traitorous Titan of oceans, lounges on a chaise. She confronts him about abandoning his siblings in Tartarus. He says he knows they curse his name because he has sources. Lyra suspects he may have been inside Tartarus himself, but another time crack takes her before she can press further. She returns to Hades’s rooms, but when Hades appears, another time crack opens. Rushing, she tells him she thinks Oceanus is glamouring everyone. Hades is confused as she has not yet told him about the glamours. Lyra instructs him to meet her at the Colosseum during Athena’s Labor and reveals that Oceanus can access Tartarus or has a source inside. Hades is skeptical but promises to investigate after the Crucible before time takes her.

Time deposits Lyra at Hades’s Lock. The Hades copy appears and takes a step across the threshold, grunts in pain, and disappears, the door slamming shut. Demeter emerges from her Lock and explains that guardians who cross their barrier must regenerate. She reveals that the guardians or copies are pieces of the real gods’ souls, cut from them when the Locks were created. Hestia’s soul-piece glitches because Hestia died in the Overworld. If the original god dies, the soul-piece is affected, but not the reverse. Lyra suspects the Hades guardian mirrors the real Hades more closely as his emotions intensify. When Lyra mentions that Hades helped her during Demeter’s Lock, the goddess becomes furious, calls him a cheater, and vanishes. Boone arrives and demands to know what Lyra is doing there.

Boone tells Lyra she has been gone for a week. They had to relocate after Hyperion went feral. Boone wanted to investigate Hera’s Lock but was not allowed to go alone. The Pandemonium bell rings. Lyra leads Boone to a hidden door she can see with her glamour-sight. They rush inside what appears to be an empty room, but a hissing voice welcomes them. They turn and see Medusa’s living head mounted in a wall alcove, and quickly avert their eyes to avoid petrification.

Lyra and Boone sit with their backs to Medusa. She says Lyra can safely face her, but Boone cannot, as she hates men. Medusa reveals she was once best friends with Athena before the goddess cursed her. She woke up in the wall with no memory of how she arrived, similar to Persephone’s experience. Rhea visits her regularly. Lyra suspects Rhea may be Oceanus’s source inside Tartarus, while Boone wonders if objects can be brought in through time cracks. Lyra offers to help free Medusa, suggesting Hephaestus could build her a new body. Boone agrees but insists Medusa remain until they have safe transport. Medusa confirms Rhea keeps her informed about the Locks, and they decide to proceed to Hera’s challenge.

Lyra and Boone enter Hera’s Lock for the 23rd time—in every previous attempt, one of them died, resetting them to the beginning. They emerge on a trireme in a violent storm. Boone takes the tiller while Lyra navigates by the stars. She spots Cassiopeia and directs Boone toward it. They are attacked by an emerald-scaled giant squid, dodge its tentacles, and regain course. A rogue wave knocks them off track again, summoning another monster. Lyra scans the water for a creature with a single horn.

Lyra reveals her theory: The stars are a decoy, and the true key is a horned monster that appears in every attempt. When a massive white-horned beast like a narwhal appears, Boone steers directly at it at Lyra’s signal. At the last moment, they turn sideways, and the beast impales the ship with its horn through the oar holes. They lash the horn to the vessel, and the enraged beast inadvertently pulls the ship toward a lighthouse. Just before the collision, Boone grabs Lyra and leaps into the water. Lyra lands near the lighthouse base where a childlike Zeus prepares to attack with lightning. Before he strikes, she touches a rock and completes the trial. They find themselves back in the Lock chamber, drenched. Hera congratulates them, and the door opens to cheering Titans.

Phoebe wakes Lyra and leads her and Boone to a new time crack she has sensed. Persephone attempts to join them, but Lyra gently convinces her to stay, as she was never present in Lyra’s past. As Lyra steps into the crack, Boone is separated and does not travel with her. She arrives outside her bedroom in Olympus on the night after Athena’s Labor and realizes this is when she must instruct Hades to break her heart. Believing it safe because her past self never saw her, she sneaks into the room. She sees Hades curled protectively around her sleeping form and reaches for him. His hand shoots out, grabs her wrist, and he teleports them away.

Hades is confused when he recognizes the captured woman. Lyra tells him she will be his queen only if he breaks her heart first. She insists that if he does not do so, the sirens will see her during Zeus’s Labor, and she will die. Her curse of being unlovable must be fully active for the challenge. Hades is devastated, asking how he can reject her after they just made love. Lyra promises that if he does, they will survive and end up together.

Hades confesses he has loved Lyra since he was a teenager. He states that she is the reason for the prophecy, as he would burn the world for her. Lyra assures him he would not do so because he knows the destructive act would hurt her. They share a desperate, passionate kiss. Lyra whispers for him to have faith in their future. He holds her tightly before she vanishes.