Breaking Through the Black Whirl (1982)

Gangland killer Wong Biau is convicted and sent to prison for murdering Lin, chief of a rival gang who happens to be the brother of Wong's girlfriend. Actually, Wong is innocent. Years later, Wong is freed and making a start to be a law-abiding citizen. But Lin Wai-ying, his former girlfriend, now the leader of the rival gang, makes repeated attempts to kill him...