An alien comes to earth with a botanical virus, but a gutsy Arizona widow wins him over with her garden-fresh cooking, and then tries to topple the corrupt government that put him up to it.
When a long gone scientist suddenly visits his wealthy twin brother, he reveals he was researching animal head transplants in a remote Asian lab. This knowledge proves to be extremely critical after an accident when the brother finds himself in complete control of his relative, who starts showing signs of mental instability.
An angry alien from the planet Moosha Maa decides to borrow his neighbors destrukto ray to destroy the planet Earth because the earths radio and TV waves are messing up his intergalactic TV reception.