A former police officer gets dragged into a game of cat and mouse initiated by an intelligent killer to punish criminals outside the law.

On a dark night, Xueming hits a pedestrian with his car and flees the scene. Desperate to escape his feelings of guilt, he decides to approach the dead man's wife, Mrs. Liang. He develops an ambiguous relationship with the widow, while a policeman tries to resolve the investigation that will change his life forever.