Casey Chan Lai-ying directs this Hong Kong/Japanese co-production about a pair of Hong Kong cops -- Julia Cheung (Sibelle Hu Hui-chung) and Teddy (Chin Kar-lok) -- who arrive too late to prevent crazed Japanese detective Sato from murdering a group of mobsters from notorious crime boss Jimmy Lee's syndicate. Teddy eventually catches up with Sato, only to let him go because they are longtime friends. Lee, who lost two sons in the melee, blames Teddy and kills him along with his entire family, save Teddy's sister Sally who is also Sato's girlfriend. Soon Lee's henchmen are heading to Japan to track down Sato, as is Julia, but for entirely different reasons. Karate master Sonny Chiba also appears.