Bruce returns to Manila to investigate the murder of his sister, Susan Chang. On the night of her attack she was helped by an amateur-boxer, Ramon "Rocky" Roblado. Behind Susan's death is the 'Black Dragon Society', who are searching for a sacred Samurai sword hilt which contains a map leading to a hidden location of one billion in Gold. Upon the discovery that Rocky may have the artefact, the leader of the Black Dragon's orders his men to retrieve it for him at any cost.