On their wedding day, Li Hanzhou was controlled by Chaos and stabbed Yun Shuyao, earning a traitor's reputation and remaining trapped for three hundred years. Returning with no memories, he presents his wife with divorce papers, only to be brutally beaten by her. In search of the truth, the two descend to the mortal realm to slay demons, repeatedly entering illusions and uncovering the truth behind the seal placed years ago. Xu Weixun, an undercover agent who has remained hidden for three hundred years, and Yin Jin, a devoted Demon Lord, make their appearances one after another. The immortal and demon realms join forces to fight Chaos. After misunderstandings, illusions, and life-and-death battles, the two finally clear their names, make up for their regrets, and hold their wedding anew, promising to stay together for the rest of their lives.