A flying saucer lands in the Everglades and alien creature Tagona emerges. He kills various people who stumble across his presence. Tagona is confronted by swamp hermit Zeek, who reveals himself to be Tagona's enemy Zafara Zaran, emperor of Arcturus, who banished Tagona 3,000 years earlier. Tagona kills Zafara but before he dies the old man says his descendants will take up the hunt until Tagona is destroyed.; An evil swami is found guilty of his crimes and is sentenced to death. Before his death, he vows to destroy all the jury members who convicted him from beyond the grave. After the execution, a mysterious box is sent to each of the jurors' homes. When opened, it unleashes a spectral monster that kills the victims.