在这部猴拳寇四片中,寇四生性任侠，武功高强，以保镖为生。民国初年，押去南方，适逢爆发南北战争，兵荒马乱，交通切断，被迫流落北平，暂时栖身，等回乡。一日遇见军阀爪牙檓行霸道，欺压平民，忍无可忍下出手打伤多名官兵，被军阀追捕，在走投无路之下于一间武馆藏身。武馆馆主耿荣宾为北平有名之劈挂拳名师。寇四慢慢察到猴子的打斗一样有适退攻防之分，经过闸时间细心观察钻研，最后创造了猴形拳。
The is a true story about a Chinese patriot and martial arts instructor Koo Sze who is arrested by a corrupt government official named Chow Li Ming (Shih Kien) for not wanting to join the army. While Koo Sze is locked down in jail, he watches out of his window a "monkey" show. How interesting? Chan then decides to teach himself Monkey kung fu.
