Billy Lo is a famous action martial arts film star who is being courted by a crime syndicate. After constantly rejecting their advances they try to kill him and fail. Lo fakes his own death and goes underground to get back at the criminal gang.
Bruce Lee only half finished a version of this film before he died in 1973. Five years later director Robert Clouse who made Enter the Dragon with Lee completed the film.
In order to do this, he used the existing footage with Lee, also used stock footage from previous Lee films and got a double and shot new footage with a new story line.