The Black Enforcer(1972)

Lawman Gong Tianlong captures vicious thief and murderer Guan Yunfei but an ambush by hired men sees the thief set free and Tianlong's whole family murdered. Left to die himself but rescued by Ling Tzu, Yunfei's son frames Tianlong's and throws him away to rot in jail. All while Yunfei betrays an accomplice of his but ends up blind in the ensuing fight. Cut to 15 years later with Tianlong desiring revenge, Yunfei has developed into a skilled, blind swordsman and into the two's rivalry enters innocent family...