On the summer night of 2003, a heavy rain enveloped the small northern city. When Li Wen, a construction site safety officer, was trying to stop the theft, a conflict broke out with Zhao San, the local gang leader. In the chaos, Zhao San was hit on the head and fell to the ground, blood spreading in the rain.
Li Wen thought he had killed someone and fled the scene in a panic, becoming an "important witness" sought by the police. However, on the way to escape, a mysterious phone call dragged him into a deeper whirlpool——
