Kindergarten teacher Wang is being held hostage one night by a bank robber in an all-night shop. Shop attendant Ling-ling and Wang struggle with the badly wounded robber who dies in the fight. With two more accomplices, the four girls decide to destroy the body and split the $40 million loot.

A young schoolgirl, Yuen Fong becomes caught in a tragic stranglehold of triad activity after she testifies in court over a triad beating. When this news reaches the triad leader Brother Smart, Yuen Fong must pay him protection money for what she has done as events begin to escalate.