Menial disciple Lu Chen accidentally sees that Senior Sister Shen Qingshuang will die a miserable death the next day. To prevent the prophecy from coming true, he desperately tries to make her stay, only to find that every rescue attempt plunges them both into a deeper crisis. A contract cancellation order and an old registry gradually reveal a secret that the sect has hidden for years. The so-called protection turns out to be a contract traded for human lives. From mutual probing to investigating side by side, the two seek a path to survival in a tightening dead end. However, when Lu Chen finally sees the face of the murderer in the prophecy, the person holding the sword to kill Senior Sister is none other than himself. Tomorrow is coming, and he must find the truth and rewrite their destiny.