Slumber Party Massacre III (1990)
★ 4.9 (108) · 87 min
Director: Sally Mattison · woman
After a hard day of volleyball at the beach, a teen whose parents are away decides to have a slumber party with her girlfriends. Their boyfriends predictably show up to scare them, but a stranger from the beach is also seen lurking around the house. Soon the group begins experiencing an attrition problem.