Bruce Lee has just died, but the BSI is swinging into action to salvage the situation. Aided by the brilliant Professor Lucas, cells from the martial arts master's body are removed and grown into three adult Bruce Lee clones. After undergoing training to bring their skills up to the level of their 'father', the three are sent out to battle crime, with one sent to take on a gold smuggler, and the other two teaming up to shut down an evil mad scientist.

Sammy is involved with gangsters to save his relative from a problem so he calls Dragon Hung from America to help him.

A young kung-fu fanatic learns the Mongoose style from a drunken master in order to overthrow a bunch of merciless fighters running the town.