Donnas senior prom is supposed to be the best night of her life, one of magic, beauty, and love. Surrounded by her best friends, she should be safe from the horrors of her past. But when the night turns from magic to murder there is only one man who could be responsible, the man she thought was gone forever. Now, Donna and her friends must find a way to escape the sadistic rampage of an obsessed killer, and survive their Prom Night.

In Bridgeport, the deranged high school teacher Richard Fenton is obsessed by the teenager student Donna Keppel; she witnesses him murder her family to stay with her, but Richard is arrested and sent to prison for life. Three years later, the traumatized Donna is feeling better but is still under psychological treatment and taking pills. On her prom night, she goes with her boyfriend Bobby and two couples of friends to the Pacific Grad Hotel for the party. But the psychopath Richard has escaped from prison and is lodged in the same floor in the hotel chasing Donna, stabbing her friends and staff of the hotel that cross his path.