Shen Xiujin transmigrates into a badly unfinished mishmash of a novel, and into the role of its final supervillain, the Underworld King.
Unfortunately, the protagonist has rallied the righteous people of the entire continent to hunt this boss down, and he has been locked inside the Coffin of Xuanming to await his death.
To survive, Shen Xiujin can only rely on the System to rewrite his past and clear his name.