"[4] The plot follows a group of teenagers who are marooned on an island inhabited by a female mad scientist, her pet gorilla and a zombie slave named Ivan.

While taking their boat out for some water-skiing, a quartet of teens named Reg (Don Sullivan), Skip (Paul Pepper), Julie (Mitzie Albertson), and Pam (Brianne Murphy) accidentally discover an island run by a mad scientist named Doctor Myra (Katherine Victor) who, backed by foreign agents from "the East", intends to turn everyone in the United States into mindlessly obedient zombies.

The teenagers are captured by the hulking, bearded zombie Ivan (Chuck Niles) and imprisoned in cages down in Myra's basement, but the boys manage to escape, planning to find a way off the island and then come back to rescue the girls.

A complicated fight scene serves as the climax, in which a previously zombified gorilla arrives just in time to attack Myra's henchmen and allow the teens to escape.

After they are safely back on the mainland and the proper authorities informed, it is implied that the teens will receive a reward for discovering the island and will have an audience with the President of the United States.