The Last Fist of Fury (1977)

Dae-dong is the newly appointed leader of the Jung-mu Martial Arts Hall. He is challenged by the Japanese and is killed. The Jung-mu Hall is almost at the point of ruin. The teachers of Jung-mu Hall go searching for the master Keum-san of Chosun, the great Taekwondo fighter. Keum-san was the Korean teacher of the deceased Dae-dong and a highly respected warrior. When Keum-san's disciple, Chung, hears the sad tidings of Dae-dong's death, his only friend, he goes to China with the Jung-mu masters to hold his funeral. During Dae-dong's funeral, Chung receives a challenge from the treacherous Japanese man, Kuromasa. Chung kills Kuromasa and returns to Chosun but he discovers his wife and master Keum-san murdered. Stunned, Chung destroys them all and leaves for somewhere desolately carrying his young child.

Unfortunately the movie The Last Fist of Fury is not yet available on Disney Plus.