一天,一民妇带女入寺进香,被主持黑沙掌看中,将女收于黑房中,此事被老拳师吴老东及儿子吴家秦看破,与黑沙掌及众淫僧大打出手,老拳师不慎命丧掌下,临终时嘱家秦必须学会鸳鸯腿才能打败黑沙掌。一群卖艺姑娘,以舞艺赚取生活费,黑沙掌等人当场调戏众女,为首的凤兰即以鸳鸯腿攻打黑沙掌,由于凤兰乃女儿身,鸳鸯腿功力不够,被黑沙掌打倒,家秦冲入阵中,救了凤兰,这才知道凤兰竟是鸳鸯腿传人的女儿。凤兰见了对父提出家秦有救命之恩,并愿以身相许,救父传授鸳鸯腿,家秦与凤兰苦心勤练,成功的练成了鸳鸯腿,二人齐力向南竹等发难,并得红姑相助,终于瓦解了南竹寺,同时也消灭了黑沙掌等邪僧。Righteous Chung Hoi and his father fight to stop a group of evil monks who practice the Steel Palm and kidnap young girls for immoral purposes. Father is killed by the monk leader using Steel Palm. The only move capable to defeating the monks is Double Kick, so Chung Hoi sets about to find a teacher.