On a stormy, pouring midnight, Chen Rui, a girl sharing an apartment, unexpectedly receives a strange pop-up notification that can predict death. Her best friend has a fierce quarrel with the delivery rider involved because the meal spilled and insists on giving him a bad review. Unexpectedly, the emotionally unstable rider returns late at night to their door, and the intent to kill draws closer step by step. Inside an old, closed residential building, Chen Rui remains calm, maneuvers through danger, strikes back in a desperate situation, and finally narrowly escapes using her own wisdom.