Ninja Killer(1974)

Erol is a successful cop, who lives with his sister Yasemin. Wang, the most troublesome gang leader of Hong Kong comes to Istanbul. The Security Department of Istanbul, appoint Erol to catch Wang. The Hong Kong Security Department sends their spy Wang Ti to Istanbul. Wang threatens a Chinese girl called Helen. With Helen's help, Erol starts a fight with Wang, nobody knows how it will end.