High level officer Chris is assigned to the case when an architect's body was found. Chris discovers the murderer is former engineer Mak Kun and leads a team to arrest him. At Mak's home they discover weapons, explosives, and safe designs, which leads Chris to believe Mak is planning a major robbery. Mak refuses to talk about the plan. Meanwhile Mak's girlfriend Hung secretly contacts Mak's Taiwan gang mate Gentleman and prepare a rescue from prison......