After receiving a life imprisonment sentence for a NY Chinatown massacre, Jia Shi Lan obtains a pardon through the Mafia's influence.

Cheng Tzu-hao and Kao Ying-wei, both wooing the same girl Ah Tzu, are transferred to the same Action Squad to help crack a number of robberies committed by a notorious robber/killer Ku Lung from Shantung. They inadvertently offend their immediate superior Beast King, and land themselves in a tight spot…