An evil scientist implants the brain of Michael, a murdered high school student, into a Tyrannosaurus. He escapes, wreaks vengeance on his high school tormentors, and is reunited with his sweetheart Tammy.

An evil scientist implants the brain of Michael, a murdered high school student, in an animatronic Tyrannosaurus. He escapes, wreaks vengeance on his high school tormentors and is reunited with his sweetheart Tammy. Together, the couple try to elude the mad scientist and the police and find a more appropriate vessel for Michael's brain.