When an abused heiress grows to giant size because of her encounter with aliens, she decides to get revenge on her cheating husband and those who looked down on her.

In the 1950s, guitar-playing drifter Dude Delaney wanders into a quiet town looking to play music and generally cause trouble, much to the chagrin of the local sheriff, known as Sarge. While palling around with his B-movie-obsessed friend Nixer, Dude meets the beautiful Donna, and is offered a position in a rockabilly band, but the sheriff is intent on getting rid of him by any means necessary.