Chen Xiaoyu, a destitute young man burdened with debt, and Song Yuqi, a brave and fearless young woman, meet in a mysterious coastal town. People often vanish mysteriously at midnight, their faces frozen in terror and their mouths curved into identical smiles. Chen Xiaoyu is meticulous, while Song Yuqi is decisive and courageous. Together, they set out to uncover the truth.
As their investigation deepens, they discover that the townspeople are controlled by a mysterious force and repeat eerie gestures, while the books in the library hide secrets of their own. The town is actually an altar made from human bodies, and an ancient evil lurks in the shadows, preparing a sinister ritual. The two protagonists are dragged into the plot and chosen as potential sacrifices.
With the help of a System they accidentally activated, they embark on a path of defeating monsters and leveling up. But they must face not only a powerful evil presence, but also the townspeople's misunderstandings. As the ritual draws near, the pressure mounts. A vast conspiracy seems to lurk behind the System, and if it is exposed, they will be hunted relentlessly by evil forces. In this battle against evil, can they overcome their lack of strength, clear up the misunderstandings, stop the ritual, and uncover the System's secrets? Everything remains unknown.