Martial arts master Jin Tianyun (Chen Kuan-tai) decides to punish a trio of miscreants called The Three Devils who have been terrorizing the countryside. However, he is betrayed during the ensuing battle and must flee. Meanwhile, young martial arts student Gao Jian (Yuen) must suffer through a torturous punishment, thanks to a pair of obnoxious senior students (including Chan Lau). Later that evening, a badly injured Jin appears on Gao's doorstep and, at his request, Gao keeps the man's presence a secret while he recuperates. In return, Jin agrees to secretly teach his benefactor some useful kung fu, instead of the flashy nonsense his school is practicing. Emboldened by his new abilities, the youth takes it upon himself to try and bilk one of the Devils but the miscreants soon overrun Gao's school, turning it into a haven for criminals.

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