Prom night

 Donna Keppel returns home to find her father and brother dead. She hides under the bed as she saw Richard Fenton, her  teacher who is obsessed with her, kills her mother in front of her. Three years later, she has been in therapy and she tells her therapist the story. Donna is now living with her Aunt Karen and Uncle Jack, and is about to graduate from high school. She and her friends are getting ready to attend their senior prom that night. While at the salon with her friends, she thinks she sees Fenton watching her from across the street, but when a bus passes, he is gone. At the town's police station, Detective Winn learns that Fenton has escaped from prison and warns Donna's aunt and uncle. At the prom, Fenton arrives at the hotel kills the housekeeper to get the key. On the dance floor, Claire has a fight with her boyfriend Michael and goes up to her room with Donna to calm down. After Donna leaves, Claire is alone and hears noises. She sees Fenton, he stabs her and kill her. Detective Winn arrives and warns the hotel staff to be on the alert. Fenton kills a hotel employee looking for the maid and takes his uniform. When Claire does not return, Michael goes upstairs to see her. Fenton hides in the room's closet, but Michael sees him shut the closet door. Michael opens the closet and sees Fenton in there, he stabs and kills Michael. Lisa and Ronnie head up to the room, Lisa runs into Fenton in the elevator. While Lisa in the room, she realizes that it is  Fenton and runs down to warn Donna, but she get caught by Fenton and he killed her. Winn and Nash find the body in a car in the hotel parking lot. Winn goes up to the room and finds the housekeeper's body. Winn knows that Fenton is in the building. Winn sounds the emergency alarm. Donna is still inside Winn goes back to the room.Police search the hotel, but cannot find Fenton. Winn knows that Fenton has left the hotel. Winn goes to Donna's house. In the house,  Donna goes to the bathroom and returns to find Bobby is dead. Donna bites Fenton on the hand and tries to escape. Fenton tries to hold her down but Donna kick him. When Fenton is about to stab Donna, Winn runs in and shoots Fenton several times, killing him. The End.