In the town of Tromaville, Melvin, a janitor, is transformed into the powerful monster Toxic Avenger after falling into a toxic waste barrel. As Toxic Avenger, he defends the town from criminals and rescues Sara, a blind woman, from a rape, eventually becoming her sweetheart. However, the corrupt Mayor Peter Belgoody and his gang seek to destroy the heroic monster.

The Toxic Avenger
A humble janitor is reborn as a mighty champion after an unexpected plunge into a hazardous waste tank, now wielding incredible strength and courage to vanquish villains and protect the innocent.