神偷李傑深夜闖入公司偷走古玉馬. 怎料竟遇着魁星幹探王磊, 展開一場追逐戰, 王探長在調查失竊案期間碰上保險調查員柯小姐, 他們都同時懷疑是公司陳老闆監守自盜. 同一時間, 王磊妻子又遭殺害. 王磊決定要查出兇手是誰及案件的真相!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.