Policewoman Carmen returned to Hong Kong from England for training. Her superiors sent her to get close to Niu Lanchang, who had recently taken over Ma Liang's criminal group. The boss first introduced the members of the criminal group, which must include the mean leader Ma Liang, and Niu Lanchang, who recently joined the group. He also has a subordinate He Dong has a fiery personality and is ruthless. She was assigned as a dancing girl by his boss and got close to Niu Lanchang at an easy opportunity. Gradually, Niu Lanchang also accepted her. There were scenes of hand-to-hand fighting in the process, but she was willing to sacrifice her own life and fight with Niu Lanchang in order to solve the criminal group. After Niu Lanchang's many failed crimes, he began to doubt her.