 On 28 June 1945, along the night of the Graduation Ball in Avalon Bay, the youths Roy (Timothy Wahrer) and his girlfriend Francis Rosemary Chatham (Joy Glaccum) are murdered penetrated by a rake and the killer is not found. On 28 June 1980, a new Graduation Dance is organized by the student Pam MacDonald (Vicky Dawson) since Major Chatham (Lawrence Tierney), who is very sick and in a wheelchair, has prohibited any celebration for thirty-five years. The local Sheriff George Fraser (Farley Granger) is traveling for fishing and Deputy Mark London (Christopher Goutman) is in charge of the security of the location. When a serial killer attacks the students, Mark and Pam seek his hidden place.