The Titans trickle out one by one over the following hours. Most are cool or openly critical, believing Lyra wasted her time meddling with the past. Cronos alone stays and sits beside her in the hallway. Their comfortable silence gradually becomes conversation. Lyra raises her growing suspicion that Oceanus is the one maintaining the glamours on the gods, given that he seems to have inside knowledge of events in Tartarus. Cronos is skeptical, noting that the scale of such magic would require multiple powerful beings working together. Lyra leans her head on Cronos’s shoulder as he assures her they will find answers together.

Lyra and Cronos are jolted awake by a yelp from inside the room. When Persephone opens the door, Lyra immediately sees that Persephone has been glamoured—a fresh veil layered over the existing one. Before she can explain, a shoved Persephone sends Lyra stumbling into a shard of broken time.

Lyra lands on Olympus for the third time, arriving just in time to watch her past self vanish back through broken time in front of Hades. She quickly goes to a shaken Hades, but he erupts, furious at her confusing appearances. Lyra offers him a way to confirm she is real—to ask her something only she would know. When words fail, Hades closes the gap and kisses her, instantly certain it is truly her.

As he kisses Lyra, relief breaks Hades’s centuries of restraint. He tells her he has loved her for at least half his life, falling for her somewhere between her sporadic visits across time. He acknowledges he cannot fully have her yet, but Lyra promises him her heart regardless of time or distance. Driven by that promise, Hades binds them together with a glittering ribbon of power, speaking a formal vow. Lyra says the words back, binding herself to him. The ribbon ignites around them both as they come together, sealing their bond.

Afterward, Lyra and Hades lie together in the Underworld. Lyra discovers she can now see the golden bond lines etched into their skin with her glamour-sight. Hades asks her not to go, catching himself immediately. They discuss what she can and cannot tell him. He assumes Cronos must be dead, since Lyra now controls time, and Lyra carefully redirects without confirming or denying it. She reminds him to retrieve Pandora’s Box when she wins the Crucible, and names Persephone, Charon, and Cerberus as essential to the plan. Hades notices Lyra’s long hair and interprets it as proof she is from far in the future, taking comfort that she must survive to reach him. He holds her and asks her never to leave him again after they are married, not knowing how much that request will cost her.

Time yanks Lyra from Hades’s arms and drops her back in Boone’s room in Tartarus, where the Titans are arguing. Before she can explain, the glamoured Persephone shoves her into a crack of time. Lyra returns in an instant and begins stripping the glamours from Persephone, Boone, and Phoebe in rapid succession. Phoebe, coming back to herself, declares that the prophecy linking Boone and Lyra was itself a glamour.

The revelation that Boone and Lyra were never fated sends the Titans into further arguments. The implications are that Aphrodite’s Lock was built around that false prophecy, meaning their plan to unseal it is in ruins. A violent earthquake rips through the tunnels, cracking the ceiling. The four pillar Titans hold it up while everyone evacuates.

In the aftermath, Lyra convinces Cronos to take her to Hades’s Lock for answers. They barely reach it before the Pandemonium bell sounds. As the Pandemonium flood toward them, Lyra sees them clearly for the first time through her glamour-sight. They are not shapeless monsters, but tormented human forms jerking and writhing like stop-motion animation. Hades reluctantly allows both Lyra and Cronos inside his Lock just before the door slams shut.

Inside the Lock, the guardian Hades takes Lyra to his private sanctuary, a memory-constructed rocky beach where they first met. He reveals that the earthquakes are being caused by the Hades above, who is trying to help Lyra in some way he can’t fully perceive. The guardian explains that he draws power from the god who made him and has been receiving flashes of the real Hades’s emotions and visions. He doesn’t know exactly what the god above is doing, only that he has gone dark—which terrifies Lyra. She asks if she can do anything to help Hades from inside Tartarus, and the guardian says no. When Lyra asks for the secret to Aphrodite’s Lock, the guardian refuses to betray his purpose. When Lyra pushes, and the stakes of Tartarus collapsing become clear, he kisses her in a desperate farewell. Boone then opens the door, and the guardian releases Lyra, telling her to go to the real Hades. As Lyra crosses the threshold, the door closes behind her with a finality that feels permanent.

Boone and Lyra prepare to jump into the abyss together, though the prophecy binding them has been exposed as a lie. Before they can jump, someone shoves Lyra into the darkness. She lands in Aphrodite’s Lock—a circular marble room ringed by a moat and a curtain of fire. She is not alone. Cronos followed her in, having pushed Boone back at the last moment, and jumped in after her. Lyra is devastated, understanding immediately what this means. Aphrodite’s replica confirms it: the Lock requires a sacrifice—one heart for the fire and one set free by an ultimate act of pure love. Cronos is calm, telling Lyra he has always thought of her as a daughter. When Lyra’s powers are stripped, Cronos presses his carved butterfly into her hand, steps toward the flames, and delivers final messages for Rhea and his children. Lyra calls him father and begs him not to go. He steps into the fire anyway, disintegrating as he burns, leaving Lyra collapsed on the ground, sobbing. The Lock announces her freedom. Behind her, Rhea screams. The gates of Tartarus swing open at last.

The open gates reveal a world outside Tartarus, consumed by Hades’s smoke and blue fire. Boone states that Cronos shoved Lyra into the Lock and held him back so that neither of them would have to bear the impossible choice of who sacrifices whom. Before anyone can move, a blast of red light slams into Lyra, lifting her into the air. The hundreds of broken cracks in time that once riddled the tunnels converge around her and begin to mend themselves, shrinking and blending until a single point of light remains. It pulses before her and gently flows into her chest. She descends to the ground as it absorbs into her. The Titans stare in silent awe. Rhea steps forward, frames Lyra’s face, and announces to the others that Lyra is now the goddess of time.

Lyra rejects the title and the power, unable to accept them at such a cost. Rhea urges her to honor Cronos’s sacrifice and be strong. A column of combined divine power suddenly blasts through the cavern, and an earthquake brings the remaining structures down. As Tartarus implodes, Lyra teleports outside the gates. Hades’s guardian holds the ceiling long enough for the Titans to escape, then releases it and is buried in the rubble.

Outside the gates, the group emerges to find a dozen gods of death—Hermes, Hecate, Anubis, Hel, Eshu, Mictlāntēcutli, and others—waiting for them. Glamoured and ready to fight, they declare that the Titans cannot be allowed to remain free. The Titans, now armored and armed, tense for battle. Rhea’s lions burst through to greet her. Before the standoff can escalate, Lyra steps forward to shield her family. She tells the gods of death that she and Boone will stay to protect the Titans from them.