As Yrene's final healing begins, Chaol is overwhelmed by agony and blacks out, falling into the deepest part of the darkness lodged within him. In that internal pit, the Valg corruption forces Chaol to relive his shame: his father's bargain, his broken promises, his fear that he is worthless, and his belief that he betrayed the honor he once tried to uphold.

The darkness next shows Chaol Aelin and Rowan, using Chaol's resentment and heartbreak against him. Chaol remembers loving Aelin, hating her for her lies and violence, and feeling replaced by Rowan. But as Chaol sees Aelin's scars, guilt, and vulnerability, Chaol understands that Aelin changed, loved someone else, and still tried to honor him more honestly than Chaol had honored Nesryn after falling for Yrene.

The visions shift to Dorian and the horrors beneath the glass castle. Chaol relives fleeing the council chamber, leaving Dorian behind, and later learning what the possessed king and Valg-controlled Dorian did to Chaol's men. The darkness tries to keep Chaol trapped in guilt, but Dorian's remembered presence reminds Chaol that he still has one unbroken promise: to save Dorian and their kingdom.

Chaol realizes that his suffering is not the end. Choosing that remaining oath, Chaol tells the vision of Dorian that he is coming home, and Dorian vanishes. Yrene then appears, glowing with healing light, and explains that the last kernel of darkness now belongs to Chaol: it can remain a harmless scar if Chaol fills himself with forgiveness, kindness, and love.

Yrene warns Chaol that leaving the darkness will hurt because it does not want to lose him. Chaol accepts the pain, recognizes that he has life, love, duties, and himself to fight for, and understands that breaking can become the beginning of being reforged. Chaol stands, faces the darkness without fear, and takes Yrene's hand.