Build a movie plot around this: What year were Rose and her boyfriend murdered? 1945
During the second world war a woman named Rosemary Chatham writes a Dear John letter to her boyfriend, breaking up with him due to being away too long. On June 28, 1945, Rosemary (Joy Glaccum) is attending a graduation dance in the town of Avalon Bay with her new boyfriend Roy (Timothy Wahrer), who suggests they go out to the point in order to make out. While there, they are attacked by a mysterious prowler in an army combat uniform, who impales them both with a pitchfork, leaving behind a rose.Twenty years later; on June 28, 1980, Pam MacDonald is organizing the first graduation ball in 35 years with her friends Lisa, Sherry and Sherry's love interest Carl. That afternoon, while visiting her love interest Mark London, who is the town's deputy, she overhears a report of a prowler, who may be on the way to Avalon Bay. The Sheriff, off to a cabin retreat leaves Mark in charge of keeping order in the town and at the dance while he is away. That night, after Pam leaves for the party, Sherry receives a surprise visit from Carl, who goes to undress to join her in the shower, but he is attacked and has a bayonet shoved through his skull. The killer then moves into the bathroom and impales Sherry with a pitchfork. At the dance, Pam becomes jealous when Mark is pulled into a dance with Lisa and leaves when he accidentally spills his drink onto her dress. She returns to the dorm to change but is chased by an unseen prowler, eventually running into Major Chatham; an old man bound to a wheelchair, reuniting with Mark, he investigates but does not discover the bodies of Sherry and Carl. They go together to investigate the major's home, not finding him there, Pam realizes that his daughter Rosemary's killer had never been found. Convinced the prowler from earlier is the one responsible, Mark heads with Pam to the dance to warn the chaperone Miss Allison about the possible danger. Meanwhile Lisa, fed up with her boyfriend Paul for getting drunk and sick, goes out to a nearby pool to cool off. Paul is arrested by Mark for...