![Otis](https://image.tmdb.org/t/p/w185/hDujIe7PxXxxkWK844sCTkwqxCu.jpg)
American astronaut Frank Douglas mysteriously disappears from his spacecraft as it parachutes to Earth. He is apparently replaced by or turned into a large, radioactive, humanoid monster. A team of scientists and military men attempt to capture the monster.