Wu Xingxue has awakened and realized that he is indeed an archfiend. However, much of his past, like his connection to the mysterious Rex Spiritus or the Arbor Divinus, remains an enigma. Adding to the puzzle is the legendary Tianxiu Immortal, Xiao Fuxuan, who continues to support him. Wu Xingxue's fragmented memories suggest that Xiao Fuxuan's helpfullness might stem from a surprisingly simple reason--one that ties them together inexorably.

Determined to uncover the truth, Wu Xingxue travels with his ragtag group to the feared stronghold of fiends: Nightgleam. Once inside, he will surely encounter the archfiend who usurped his position as leader of all fiends.

But when they least expect it, the group is dragged into a vision of the past. And the illusion--if it is an illusion--holds more shocking revelations than any of them could have imagined.