A man and his teen son lead the charge against the Japanese invaders that are determined to take over their land in a battle of fists and weapons.

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.