A man dumps a girl's body in a lake after accidentally killing her with his car on a dark and foggy night. Her enraged father soon hatches an elaborate plan to find the perpetrator and take revenge.

A new born girl is placed in a coin operated locker in the subway station. The girl is raised by a mother who is the boss for a loan shark group. Later, when the girl has grown into a teen, she carries out missions given to her by her mother.