The Ninja Empire has been run by an evil master and one member decides to leave the empire. The ex-Ninja wants a Hong Kong detective to track down the new leader and end his reign of terror. Hong Kong Cut-and-paste edit of a 1984 Taiwanese movie called "To Catch A Thief" (至尊神偷, directed by Gam Ming) with new footage. Apart of IFDs "Thunderbolt" series.