Carrying on the Prom Night tradition, this film begins back at Hamilton High School on Prom Night in 1957. As a young couple are enjoying a romantic moment together in the back seat of a car, they are interrupted by Father Jonas, a priest who slashes and immolates the lovers. Thirty years later, Jonas gets loose from the chapel basement where the church fathers had been secretly keeping him locked up and drugged. As luck would have it, it's prom night again, and group of four students have unfortunately chosen Jonas's hideout as their secluded getaway spot.