An Ace of Hearts pop-up tears reality apart, dragging Lu Chen into a midnight card game at a school. Shadows devour anyone who looks back, a graduation photo hides the secret of thirteen missing students, and every round counts down to death. With playing cards as stakes for life and death, he must tear a crack in the rules amid lies and devouring shadows. After all, only the one left at the table can reach the Joker that decides their fate.