Based on one of China's enduring epic novels, written in the 14th century, "All Men Are Brothers" continues the patriotic story of righteous warriors battling despotic leaders, featuring mythic characters familiar to every Chinese, and with a cast that has achieved an equally celebrated status among Shaw Brothers devotees.

Chen Wo-Fu plays construction worker Ku Ting, whose skill at "tai chi" (shadow boxing) is as great as his pacifism. But when his girlfriend is raped by vicious gangsters, he shows everyone the true power and beauty of tai chi.

Gu Hui, a member of the ‘Wolf Head Gang’ becomes unhappy after their new chief decides to abandon their old code of conduct. After the chief kills a travelling family and kidnaps the daughter, Gu frees her and escapes, hiding out in a nearby town and trying to start a new life as a humble shoemaker. Unfortunately, the gang refuses to let him go and put a bounty on his head, forcing him to face up to his responsibilities.

Hua Heng is a poverty-stricken aspiring painter whose day job involves painting the ads that go up on the sides of buildings. He and his buddies hang out in a makeshift gym set up in an abandoned building where they train and practice kung fu. His girlfriend is Gao Xin, a bar maid who is in debt to loan sharks. Into their lives comes Jiaji, who happens upon Hua Heng in a street fight with local thugs who'd made fun of the painting he's carrying and decides to help him out.