Slumber Party Massacre III

Slumber Party Massacre III is the second sequel to the original 1982 slasher film The Slumber Party Massacre. It was directed by Sally Mattison, written by Bruce Carson and produced by Catherine Cyranthe alongside producer, Roger Corman, who had produced the first sequel in 1987.

Then, it cuts to a group of teenage friends are playing volleyball at a Los Angeles beach. Jackie is sitting with Diane talking when a strange man appears and sits at the beach near them and stares at the girls. Duncan yells to the weirdo and tells him to keep his eyes to himself. Duncan then mentions to Diana and Jackie about a party, but they tell him that it is a slumber party and guys are not invited. Juliette goes to get the volleyball and talks to her boyfriend Ken. As they are leaving, Jackie goes back to pick up something and drops her address book. When Sarah gets into her car, she is grabbed by an unseen person and a drill is run through her stomach from behind the car seat, killing her.Frank drives Jackie home and they kiss for a minute. When Jackie approaches the front door, they see that it is wide open. Inside the house is Morgan, who though it was an open house since Jackies parents are moving. Jackie says that he can stay and look around for a while. After Jackie listens to messages from her mom and Morgan on her answering machine, an apparently nervous Morgan finally leaves. ........

Source: Wikipedia