An American agent is assigned to track down a renegade Soviet spy who is building an atomic device in Los Angeles and plans to destroy the city with it.

At a carnival called the Garden of Evil, a man is murdered, apparently by a gorilla…or someone in a gorilla suit.

Ro-Man, an alien robot who greatly resembles a gorilla in a diving helmet, is sent to earth to destroy all human life. Ro-Man falls in love with one of the…