Vera wakes to find Lancelot snoring in her room. She sees Merlin returning from investigating a nearby town where the land is dying like in Crayford. He warns that Mordred is on their soil, that they’re out of time, and that they may be walking into a trap at the Magesary. The procedure must be performed now. As Vera readies herself, she accidentally wakes Lancelot, who reveals that he knows Arthur gave her space to be with Tristan.

When Merlin reenters the room, Lancelot draws his sword and refuses to allow the procedure. Merlin threatens him, alluding to a previous time when Arthur found his wife dead. As they argue, Merlin confesses that he orchestrated Vera’s entire life. Vera realizes that she has never been given a real choice. She dictates new terms: The procedure will happen only after they meet the mages, and Gawain will perform it. When she reveals that Gawain has already been in her mind, Merlin is stunned.

As his queen, Vera commands Merlin to leave. He departs, saying that she will doom them all. Vera deduces from Merlin’s allusion that Lancelot killed the first resurrected Guinevere. Lancelot confirms that he ended a warped version of her and vows not to let her die again. They make a pact: No dying allowed.

Vera and Lancelot go for a training run in armor, where Lancelot shows her a magical smoky wisp from Gawain that can summon help. Five men with unnaturally large pupils ambush them. Lancelot kills the first attacker. Vera blocks a blow aimed at Lancelot but is overpowered, her sword lodging in the giant’s shield.

Arthur arrives on horseback and kills the giant. Merlin appears and instantly kills two attackers by creating gaping holes in their chests. The final man’s pupils shrink to normal just before Lancelot delivers the killing blow. Gawain finds a trigger hex on the giant containing a vial of Vera’s blood. He explains that the forbidden bewitchment binds an attacker to a target and can infect others. Merlin incinerates the vial and rides ahead to warn Oxford’s mages.

Vera witnesses intimate affection between Gawain and Lancelot and realizes that they’re in a relationship. When she tells Gawain that Mordred kills Arthur in her legends and that she should have let Merlin work her memory to save Arthur, Gawain responds cryptically that Merlin is too fixated on her memories, even though there’s far more in her than her recollections.

The party rides to Oxford in armor, passing through the Mages’ Cloak, a 10-mile magical shield. In a stone auditorium, they meet the council: Naiam, the leader; Ratamun, the second-in-command ; an elderly mage with a long silver beard; and Phoebe, a quiet, petite mage.

After Arthur recounts the Crayford incident and morning ambush, Ratamun demands that Guinevere be tried for treason. Arthur forcefully shuts him down, stating that he has pardoned his queen. Gawain presents his theory: Mages have been hoarding power for centuries by killing others and absorbing their gifts with their last breath, draining magic from the earth. Magic is now hiding, manifesting only in peril. He proposes an experiment—release gifts back to the earth—and reveals that his glass instrument can measure redistribution. Ratamun shows keen interest, asking if it can identify specific powers.

The council excuses Gawain so that they can vote on his proposal. In a side chamber, Gawain panics, believing that he will be executed for revealing their secrets. He admits that he has over a thousand gifts and has directly ended over 250 lives to obtain them. Arthur hugs him, calling him courageous.

The test is approved. Phoebe, Ratamun, and the elderly mage volunteer gifts alongside Gawain, releasing 20 total. The instrument works. Ratamun guesses that it could track the great gifts like immortality, making Gawain a target. At their inn, Merlin confronts Gawain for ambushing the council, warning that mages would kill to possess such tracking power—which is why Vera’s secret, the power of time travel and life restoration, must remain hidden. The instrument shows liquid moving into the main bulb. With reverence, Gawain realizes that a child was just born and received one of his released gifts.

By morning, 18 of 20 released gifts have redistributed to newborns. The council agrees to release more gifts while sending teams to hunt Mordred. At a protected campsite, Arthur and Vera have separate tents.

Vera finds Arthur’s bags in her tent and goes to return them. He is already at her entryway. She confesses her frustration over his distance. Arthur passionately responds that he wants to be with her but will not risk her mind through intimacy. Tristan arrives. Arthur tells him to ride ahead to Camelot immediately because he’s in love with his wife and might kill Tristan if he stays. Tristan quickly departs. Arthur suggests an intimacy that her body can’t remember and performs oral sex on Vera. When she tries to reciprocate, he refuses, saying that it’s not a transaction. They fall asleep in each other’s arms.

Vera wakes in Arthur’s arms and leaves to meet Lancelot. She sees him and Gawain share a tender kiss goodbye. Lancelot becomes cold when he realizes that Vera witnessed it. During their run, she confronts him, saying that there’s nothing wrong with him and that she loves him. Moved to tears, Lancelot reveals that his mother, a mage, and not Merlin, made his orb.

Suddenly, a massive explosion rocks their camp. Racing back, Vera finds the camp destroyed, both soldiers dead, and Merlin bloodied and in shock. Lancelot kneels beside Arthur, who has been mortally wounded in the abdomen. As Arthur dies, he tries to tell Vera that he loves her. She begs Merlin to save him, but Merlin insists that the power to restart life is not his.

An immense power builds inside Vera. She hears “Ishau mar domibaru” and speaks the words (467), performing the breath of life. A blinding blast of light explodes from her. She places her hands on Arthur’s wound and completely heals him, regenerating blood and mending organs. Arthur sits up, fully healed. Lancelot reports that Gawain is gone, taken by Mordred’s men. Vera loses consciousness as Arthur holds her.

Vera wakes more than a day later in a farmhouse. She finds Arthur talking with Otto, his father. Arthur recounts the attack: There was a magical blast focused on Gawain, who, bound by a fiery rope, cried out Mordred’s name and was taken, along with his instrument. Lancelot enters and reveals that Viviane is his mother. Arthur confirms that he has known for a week. Otto explains that Viviane and Lancelot lived down the road from a young Arthur, which is how Viviane first recognized Arthur’s destiny. Lancelot and Viviane kept their connection hidden in Camelot.

The group realizes that Merlin faked Viviane’s execution and that a mage on the council must be working with Mordred, as only the council knew about Gawain’s instrument. They cannot trust Merlin and must find Viviane for answers. Lancelot discovers that his orb hums and points westward—it can lead them to her.

Arthur and Vera walk outside. He tells her that the dress she wears belonged to his deceased mother and states his unwavering support for Lancelot regardless of whom he loves. Vera tells Arthur that she’s in love with him. He responds that he loves her too, and they kiss. They acknowledge that magic may have influenced their feelings but affirm what they feel is real. They find peace in the moment before facing an uncertain future. They are alive, together, and that is enough.