Mnemosyne leads the group through tunnels lit by sconces and the Titans’ own glows. They pass a cell where Ocnus is condemned to weave an eternally eaten rope. Iapetus warns Lyra to avoid doors marked with an X, which can kill and reset time. Mnemosyne’s weary tone makes Lyra contemplate how many times she might have already died in previous timelines.

At the map room door, Lyra states that only Rhea, Phoebe, Mnemosyne, and Koios may join the planning session. Cronos protests, blaming Iapetus for throwing Lyra into the second Lock. When Lyra accuses Cronos of castrating and decapitating his father, Rhea intervenes, explaining that revealing the true story would reset time by 150 years. However, Cronos vehemently denies that he ate his children. As Lyra enters the map room, she walks directly into a shard of broken time.

In the Underworld, Hades senses an uninvited presence and confronts the intruder outside his castle in Erebos. Lyra materializes, disoriented—this is clearly the past. As she attempts to flee, she collides with him. Hades recognizes her as Lyra Keres, the woman he has dreamed of since two brief previous encounters, and refuses to let her vanish again. She offers a deal: information in exchange for his help staying hidden. When Hades deduces her time travel is involuntary, Lyra confirms she is a goddess but refuses to say more. Hades teleports them to Phlegethon—a cavern of fire-rivers and skull-built cells—and locks Lyra inside, then teleports away, leaving her gasping in outrage.

Twenty-three hours later, Hades paces in frustration. Most souls break in seconds in those cells, but Lyra has held out. Unable to wait longer, he visits her cell with a pomegranate. She eats it using techniques that confuse him, mentioning things like TikTok. She asks him to sit on the floor rather than tower over her, and he reluctantly complies. As they talk, Hades notices Lyra’s imperfections and finds her beautiful. When he catches her wrist to examine her star tattoos of Orion’s Belt she explains she used to wish on those stars from her childhood bedroom. Hades recalls doing the same. Using his god-of-death command voice to get answers, he notices her pulse jump and feels a flare of desire that scares him. When Lyra suggests creating water gardens outside his home, Hades wonders if she can see his future.

Lyra denies being a time goddess, and Hades deduces she knows his father. When he asks if Cronos sent her, she denies it. Telling Hades that she would never hurt him, Lyra insists that revealing more would be too risky. Accepting her limits, Hades unlocks her cell. He leans close as if to kiss her, but stops short, warning that breaking his trust will return her to the cell permanently. He calls her his “star.” They teleport to his ornate suite in Olympus, where he offers her use of a sunken bath and states plainly that he will not kiss her or touch her intimately. Lyra agrees, though disappointed. She realizes this moment occurs long before he kissed her at Zeus’s temple during the Crucible Games. A crimson crack of broken time swallows her, and Lyra reappears in the Tartarus tunnel moments after she left. Koios mutters something about it happening already. Lyra insists they continue.

Boone blocks Persephone from the map room, sending her away. Rhea uses a glamour to create a three-dimensional map of Tartarus on a stone table, displaying the two opened Locks among seven. When Boone asks why the Titans cannot unseal the Locks themselves, Rhea reveals they would die. They lost the Titaness Themis in Hestia’s Lock, as stripping Titans of their powers causes them to cease existing. Lyra asks why they cannot escape through the time cracks and remain in the past. Rhea explains that the cracks always retrieve them.

Examining the map, Boone identifies fire in Aphrodite’s Lock, while Lyra worries about imagery suggesting a child in Hera’s Lock. Rhea reveals that Aphrodite’s Lock is the primary problem. Lyra has never survived it. Cronos arrives and announces they will train both Lyra and Boone to prepare for the Lock.

Lyra trains on a glamoured obstacle course replicating Poseidon’s Lock, repeatedly failing and falling into electrified water. Boone completes the course effortlessly while Cronos observes that Lyra was taller in previous attempts. Lyra explains that her parents’ neglect led to childhood malnutrition. She blames Zeus for her parents’ abandonment of her, as his curse made her unlovable. Cronos reveals that Lyra’s parents always abandon her in every timeline. He also admits that in timelines in which Lyra does not descend to Tartarus, the Titans reset time because she is their only hope of escape. Devastated, Lyra realizes the extent of their manipulation.

Boone insists Lyra take a break from training, but Cronos argues she must master the course. Cronos refers to Lyra as Alani—her birth name—and explains it means death bringer, fitting for Hades’s queen. Lyra says she likes the name. Cronos smiles, his expression so reminiscent of Hades that it unsettles Lyra. After Cronos and Boone leave, she retrieves her axe and walks through the tunnels to Hades’s Lock.

Lyra stands before Hades’s Lock without entering. The blue bident symbol on its seal sparks to life as if inviting her in. Boone finds Lyra and warns that nothing in Tartarus can be trusted. To prove the Hades replica is not real, Boone wraps his arm around Lyra. The replica goes threateningly still, calculating. Boone tells Lyra the real Hades would have intervened immediately and violently. Realizing he is right, Lyra turns away from the imitation and leaves with Boone, her heart aching.

While trying to rest, a time crack takes Lyra to a forest battlefield where an explosion knocks her off her feet. She sees a hecatoncheires (hundred-handed giant) hurling bodies across the sky. A younger Cronos appears, absorbing a chimera’s fire blast mid-air, and recognizes Lyra, declaring she saved his son. Before he can explain further, Zeus strikes Cronos with massive lightning, launching him miles away.

A younger, armored Zeus hovers in the air and warns Lyra to flee. When she asks why he attacked Cronos unprovoked, Zeus blasts lightning at a younger Iapetus behind her. Iapetus pleads with Zeus, insisting the Titans are not enemies. Realizing she is witnessing the Titanomachy (the battle between the Titans and the younger Olympian gods), Lyra flees into the forest. She sees Aphrodite slam into Hestia, causing her to strike her head on a rock. A strange shimmer covers Hestia’s face—reminiscent of a veil Lyra once saw on Zeus. When Phoebe appears, Aphrodite and Hestia advance on her while she is caught in a prophetic vision. Emerging from it, Phoebe tells Lyra she is coming into her first power—the ability to see glamours. Lyra focuses and clearly perceives an iridescent mesh veil over Hestia’s face. Phoebe calls her Alani and tells her to hide as the two goddesses attack.

Lyra teleports to a high bluff overlooking the devastated battlefield. She observes that a hecatoncheires and Demeter also have veils over their faces. Lyra realizes that the gods have been glamoured into fighting their parents. Rhea appears, covered in golden ichor. She recognizes Lyra from Hades’s descriptions and confirms the Titans refuse to fight back because they would never harm their children. When Lyra describes the veils, Rhea confirms that Lyra is the goddess of glamours—able to see them regardless of source. Lyra realizes the entire narrative of evil Titans is a lie. Black smoke rises from the ground as Hades arrives, caging Rhea. Lyra urges Rhea to flee, but the Titaness waves her hand and sends a tingling rush through Lyra instead.

A glamoured Hades confronts his mother with hatred, believing she allowed Cronos to devour him as an infant. Rhea insists he has been bewitched, but he refuses to listen, preparing to imprison her in Tartarus. Lyra rushes forward, embracing Hades and pleading with him to stop. For a moment, his veil wavers and he seems to recognize her. Rhea touches his forehead and commands him to sleep. Kneeling over him, Rhea transfers her own protective animal tattoos onto his arm—the spider, butterfly, owl, fox, and panther—and explains she ensured Hades could not see Lyra clearly to protect his future trust in her. Before leaving, Lyra swears an oath on the River Styx to help the Titans. She teleports to the Underworld, where a smaller, more ancient version of Hades’s castle stands, and water gardens are just beginning to take shape. She waits for time to return her to Tartarus, crying for the wrongly imprisoned Titans.

In the present day, Hades stands before his throne confronted by Anubis, the Egyptian god of death, with Hecate also siding against him. Anubis warns that if Hades does not abandon his plan to free those imprisoned in Tartarus, the death gods will destroy it entirely. As death gods from pantheons worldwide appear, surround him, Hades realizes Zeus has summoned them. He prepares to fight them all.

Lyra returns to Tartarus to find Boone burned and singed. He describes being transported to a past version of Olympus, where Poseidon and Hera took him to see Zeus, seated on a massive golden throne surrounded by half-eaten food. Boone was injured when Zeus threw lightning at him. Lyra shares everything she witnessed, including her theory that the gods were glamoured. They decide to test Lyra’s power over glamours.

Lyra and Boone wake Persephone to request a glamour demonstration. She manifests a bunny, then glamours it to believe it is a frog. Lyra sees an iridescent veil of light appear over the bunny’s eyes. Persephone then explains that the Titans knew Lyra was coming through prophecy and reset time repeatedly, engineering events so Hades would choose Lyra in the Crucible. They then used Pandora’s Box to bring Lyra to Tartarus. Persephone says her last memory before entering Tartarus was of noticing something odd about Hades’s face, going to sleep, then waking imprisoned. Seeing a veil over Persephone’s face, Lyra reveals she has been glamoured.

Lyra and Boone practice the obstacle course for Poseidon’s Lock. Boone guides Lyra through the swinging hammers, focusing her on only the nearest threats. When Cronos arrives to criticize their method, Rhea calms him. Seeing Rhea triggers Lyra’s memory of the Titanomachy, and she silently resolves to keep her promise. The Pandemonium bell rings, and the Titans flee, leaving Lyra and Boone stranded on the course. A crack of broken time appears and moves directly toward them. Boone navigates them backward through the hammers, and catapults Lyra over the electrified pool. As she flies through the air, a second time shard appears below and swallows her, while the first takes Boone.

Time deposits Lyra at Hades’s feet on the docks of the River Styx during the Anaxian Wars. Tens of thousands of souls wait as Hades judges the dead; he urgently sends her away. Violent booms shake the Underworld, and Charon shouts that forces are overrunning the gate. Hades makes a decision and teleports away. Lyra teleports to his bedroom in Erebos to wait.

Hades returns feeling numb, having just destroyed Olympus to end the Anaxian Wars. Finding Lyra waiting in his bed, he slides in opposite her and calls himself a monster. He reveals he leveled Olympus and has erased the last traces of his imprisoned mother from the world. When Lyra uses a choir-like command, she appears in Hades’s mind’s eye as a judge, declaring he protected humanity and that his penance is releasing his guilt. Hades breaks down sobbing in Lyra’s arms. She tells him of the prophecy claiming he will do terrible things but insists he can master his fate. As he leans in to kiss her, he demands to know how she used his power but she cannot tell him. Hades uses his confession power on Lyra in return. Lyra’s confession is a declaration of eternal, unconditional love. Hades is afraid believing that Lyra deserves better. In the middle of her continuing confession, Lyra vanishes, pulled away by a time crack.

A crack of broken time deposits Lyra over the electrified water in Tartarus’s training course. Cronos tackles her to safety, but another crack takes her away again. She arrives on a rocky beach in the distant past, where three-year-old Hades is sobbing over an octopus that died in his hands, calling himself a monster. The sea rises violently, forming a giant fist reaching for the child. Lyra runs to shield him. Oceanus appears, holding back his father, Uranus the Primordial, who has seen a prophecy indicating that Hades will destroy the world. Young Hades creates a protective obsidian dome, then shatters it into hovering daggers. Cronos appears and stops him, but one dagger embeds in Hades’s forehead, revealing the origin of his pale streak. Cronos then kills Uranus with an obsidian scythe—the god-killer—to protect his son and threatens Oceanus with the same fate. Oceanus disappears, and Lyra stands alone on the beach as the ocean froths unnaturally.

Lyra witnesses Aphrodite’s birth from the frothing sea, created from the remains of Uranus. Cronos, Rhea, Iapetus, and Phoebe arrive and carry the sobbing newborn goddess away. Lyra overhears Rhea say they must bind Aphrodite’s powers to prevent her from harming Hades. Another crack of broken time returns Lyra to Tartarus, where she learns days have passed. Overcome with emotion, she embraces Cronos, telling him she now understands he always loved his children.

Days later, with Boone still missing, Lyra trains blindfolded in Tartarus’s tunnels with Iapetus testing her knowledge. She successfully identifies her location near Tantalus’s cell. The Titans reminisce about Koios and Phoebe’s daughter, Asteria, sparking a playful family argument. Lyra smiles, feeling for the first time like part of their family. Cronos quietly confirms they have done something like this before—her training with them and building trust—though not exactly like this. As Iapetus and Cronos bicker, Lyra bumps into Iapetus, observing that the glamour is distracting her.

The Titans are confused by Lyra’s comment. She points to a door covered in a shimmer only she can see. The Titans realize someone—likely the gods—has hidden doors throughout Tartarus. When Lyra reaches for the handle, Cronos stops her, refusing to risk her safety. He proposes teaching her to remove the glamour so one of them can investigate. After two frustrating hours of failed attempts, Koios takes over. He instructs her to visualize an on-off switch for her power. Lyra pictures a light switch, flicks it off mentally—and the door disappears. She has learned to turn her glamour-sight off, but cannot remove the glamour from the door itself. The Pandemonium alarm sounds and Cronos rushes everyone into a hidden room. As the door slams they hear another Titan’s scream in the tunnels.

The following evening, Lyra stands on the bridge over the abyss. Persephone expresses her wish to help and reassures Lyra they become friends in every timeline. Cronos approaches with a small white quartz butterfly that Hades carved for him, snaps it in half, and gives Lyra one piece to hold inside the Lock as a way to ground herself in reality. He admits this Lock took her many attempts in past timelines, implying numerous deaths and resets. His reference to a self-fulfilling prophecy makes Lyra wonder whether knowing about her curse made its effects worse. She resolves to believe she can succeed. Deciding courage is simply taking the leap, Lyra jumps into the abyss.

Lyra appears before a replica of Demeter, who explains the Lock tests genuine kindness through three stages, each beginning with Kykeon, a hallucinogenic drink. Lyra must “save” whatever appears in her visions. The Lock strips Lyra’s goddess powers, although her axe remains. After drinking the first dose, Lyra enters a vast wheat field that grows tall around her. Whispers move through the wheat before she is struck by an invisible force and knocked down. The attacker is a hallucination of her mother, and Lyra realizes she is reliving the memory of being given to the Order of Thieves at age three. A monstrous growl rises from the field. Realizing they are being hunted, Lyra grabs her mother’s hand and begins to run.

Lyra drags her hallucinated mother through the wheat while the unseen monster pursues. Her mother resists and tries to escape. When Lyra tackles her to keep her quiet, her mother screams that she cannot wait to be rid of her. The words shatter Lyra, who momentarily considers letting her go. As the creature roars closer, she knocks her mother unconscious with her axe handle and carries her out, refusing to give in to the instinct to save only herself. When they burst from the wheat into a plowed pasture, the roaring stops and her mother vanishes. Lyra drinks the second dose of Kykeon. Tall stone walls rise from the ground, trapping her in a narrow corridor with a large combine harvester and spinning blades bearing down from behind. The familiar voice of Chance, a rival pledge who bullied Lyra, demands to know what she is doing there.

The combine rolls forward and Chance panics, shouldering Lyra into a wall as he runs past. Ignoring her advice, he tries to climb a wall, slowing himself down. Lyra doubles back to save him as the blades rise to their level. Chance declares the machine is after her, not him, then kicks her in the face, causing her to fall. She lands on soft earth and crawls out from under the combine, then climbs its ladder, breaks the cab window with her axe, and destroys the controls until it halts. As Chance accuses her of trying to kill him, he and the corridor vanish, and Lyra falls into a tall, round silo. A third glass of Kykeon appears on a table. After drinking, Lyra asks who she must save now. A blood-red crack of broken time appears and swallows her.

Disoriented, Lyra is deposited at the Colosseum during the Crucible Games, just as her opponent, Dex, is about to kill her friend, Meike. She tries to run to the arena floor to intervene, but Hades stops her from the shadows. Powerless to change events, she is forced to relive Meike’s death. The scene shifts to the dock on the River Styx, where Hades still holds her. He explains that the other Lyra is still in the Colosseum. At Lyra’s urging, Hades orders Charon to retrieve her past self and take her to Olympus. When Lyra asks why Hades didn’t save Meike, he says she didn’t arrive soon enough—a future version of her came to him days earlier and told him to be there. Struggling to process this, Lyra theorizes that a powerful glamour could be manipulating him as a red crack appears and takes her. Lyra returns to the silo in Demeter’s Lock. Another figure is now trapped with her: a hallucination of herself as she was after Athena’s Labor, covered in bug blood. Lyra realizes the final person she must save is herself.