Uk accepts her reason and walks out of the Assembly
Told Bu-yeon exposed the soul shifter he spared, Uk vows to stop feigning ignorance, turns her accusation into his excuse and leaves to find her.

Every Alchemy of Souls moment featuring Jang Uk, in story order. Played by Lee Jae-wook.
376 moments · 14h 31m · by Favseen
Moments 361–376 of 376
Told Bu-yeon exposed the soul shifter he spared, Uk vows to stop feigning ignorance, turns her accusation into his excuse and leaves to find her.
Uk leaves to hunt the last soul shifter and finds her; she accuses him of using what is between them, and he says he already let her go.
Uk explains why she waited on the tree, finally carries her, and they tease each other over chestnut rice and a thrown knife.
Refusing to watch one hunt the other, Master Lee announces he will end their current relationship by being witness at their wedding.
After a mix-up over which way to face, Master Lee lists all four of her names; she picks her birth name, and he links light and shadow.
Over the wedding drink, echoes of their past promises play out before Master Lee declares them husband and wife.
Looking out over the world, Uk says he recognized the girl with the blue marks in her eyes from the very start.
Uk refuses to count the days left; she promises a sign when her final memory returns, and Master Lee thinks of Seo Gyeong's unsent letter.
Songrim mourns Jin Ho-gyeong, Maid Kim and Park Jin with empty coffins, until Master Lee says the three did not die after all.
Jin Ho-gyeong learns Bu-yeon entered the collapsing Jinyowon through a door from Danhyanggok, and that Naksu has left her body.
Uk sets the yin-and-yang jade aside; the sign she promised comes back, and her last memory answers how she felt in their final moment.
Uk gives Go Won a plaque left by the late king so he can stop the army, and says he already reached the peak with the one he loves.
As the mages hesitate, Uk wakes the fire bird himself and turns their own creed of power for the powerful back on them.
Bu-yeon wakes the fire bird atop the constellation basin and the seventh star guides it to Uk at Lake Gyeongcheondaeho, where it vanishes.
After the fire bird disappears, a voice returns the shadow to the light that saved the world.
Uk is still carrying his wife up the tree as promised; they bicker about training before going after a huge escaped cat.