Build a movie plot around this: Which parade does Helen prepare for? Fourth of July parade
In 1996, Four high-school seniors - Julie, boyfriend Ray, best friend Helen and Helen's boyfriend Barry - drive home from a party. While driving, Ray becomes distracted, hitting a pedestrian. Another teenager, Max, stops nearby. Julie convinces him everything's okay; he drives off. The group decides to dispose of the body. At the docks the man revives, attacking them before falling into the water.A year later in 1997, Julie's home from college for the summer. She receives a letter stating, "I know what you did last summer." She tells Barry and Helen about the note. Barry suspects Max. The trio go to the docks where Max works as a fisherman. Barry threatens Max with a hook. Julie discovers that Ray works there; he tries reconciling with Julie. Max is killed by a figure in a rain slicker wielding a hook. Barry discovers a note in his gym locker containing a picture of his car and the message, "I know." Going outside, Barry is almost run over by the slicker-wearing figure, driving Barry's car.Julie reveals that the person they hit was David Egan. Ray still suspects Max. Julie and Helen think the killer may be a relative. They head out to the Egan's home. They find David's sister Missy, who explains that David's death devastated their family. Missy tells them that "Billy Blue" paid his respects after David died, claiming to be his friend.That night Helen prepares for the Fourth of July parade. Max's killer sneaks into her house, cuts off her hair and writes, "Soon," in lipstick on her mirror. As Julie goes to Helen's house, she finds Max's corpse in her trunk. When she goes to show the others, the body's missing, causing Barry to think she hallucinated. Julie, Helen, and Barry confront Ray about recent events. Ray claims that he received a similar letter.As Helen and Barry participate in the Fourth of July parade, Barry notices people wearing the same kind of slicker. Chasing one, Barry leaves Helen on one of the parade floats. As it passes by a building, she notices a shadowy figure in a slicker wielding a...