Kevin Ryan is Hollywood's leading teen heartthrob. He's the star of "Ninja Boy," a hot Martial Arts TV series. The trouble starts when Kevin decides he wants to leave the hit show, so that he can go to high school and lead a normal teenager's life. However, he is the Studio's biggest money maker and the unscrupulous executives are NOT going to let him leave. Their sinister plans involve a desirable young starlet, a muscle-bound mountain man, and an army of inept thugs trying to kill Kevin's loveable, but mixed-up manager, Uncle Bob.

A martial artist discovers his brother has been killed and seeks revenge on those responsible. Along the way, he enters a dangerous martial arts tournament and confronts a powerful gang.

Karate action and laughs never cease when a brother and sister go to California to visit their uncle. They soon discover that he's an alcoholic on the run from the Mob who want him to pay up or else...