A U.S. satellite transporting a secretly engineered creature crashes to Earth near Los Angeles. Police officers Ian McLemore (Charles Napier) and Carla Sandbourn (Ann Turkel) are assigned to pursue the escaped mutant beast. Along the way, they clash with their superior, Capt. Robertson (Bo Svenson), and the scientists behind the project. Psychic Lady Elaine Wentworth (Julie Newmar) also lends them a hand before McLemore and his chain saw do battle with the beast in a fight to the finish.