"The hardest corpses to embalme are the walking ones..."
A gang of bullies at school constantly picks on an intellectual and assiduous student, Archie. As a hobby, he is an assistant embalmer for his uncle. After the gang amused itself by transporting a cadaver from room to room, to the point of scaring a client of the undertaker, the uncle fires his nephew. However, when news reports inform of the murder of four adolescents, precisely those who fooled around with the corpse, Archie receives a phone call from his uncle, offering his apologies.
The irony pleases him in a macabre manner but, suddenly, the building isnít as calm as before. The deceased regain life to continue what they had started. They chase their victims through multiple rooms after which they escape and try to take over the town.