The 5 Kao brothers, separated since childhood, are unaware that the master Teng Lung Manor, Lung Chen-feng has killed their father. All five, however, seek to defeat the vicious gangsters at the Manor.
Fourth brother Wei meets swordswoman Yen Lai, who recognizes a scar on his arm as characteristic of the Kao family, and reveals his own identity to him. Against her advice, Wei rushes off to seek revenge on Lung. He is defeated, but encounters 2 of his long lost brothers in the process. Eldest brother Hao, a blacksmith, and 2nd brother Chih, have also gone to the Manor and have likewise been turned back by the villains. Yen appears in the nick of time to help them escape.
Yen, who is the daughter of their father's friend, has been instructed to locate the Kaos. With the aid of a swordplay manual, she sets them to train for a future confrontation with the powerful Lung. They are later joined by the two remaining brothers, Kao yung and Kao Hsieh, who have also been unsuccessful in attempting to battle Lung alone.
After much discipline and hard work, the Kaos are prepared to face Lung and his gang. This time, working together, they manage to kill Lung and vanquish his cohorts. Then, along with Yen Lai, they stay in Teng Lung Manor and restore peace to the region.