The story follows the main character Bond as he joins the SDU (Special Duties Unit of the Royal Hong Kong Police) after jewel thieves kill his partner during a heist. He is put through rigorous training as a recruit by the unit leader Stone. After training is completed, the unit sets to capture the same jewel thieves as they are still a lingering problem. They devise a plan to hide in unmarked vans in strategic locations near jewelry stores in hopes of catching the thieves in the act. The thieves escape after a foiled robbery, and the ensuing investigation and pursuit lead to the climactic showdown between them and SDU.