The House on Sorority Row

The House on Sorority Row also known as House of Evil and Seven Sisters is a 1983 American slasher film directed by Mark Rosman. The film has become a cult classic among fans of the genre.

As the party begins, a guest wanders around the pool and an unidentified figure stabs him through the throat with Slaters cane. When other guests attempt to throw Jeanie in the pool, they are stopped by the sorority sisters. The girls realize that if the pool lights get switched on they will reveal Slaters body, so Stevie goes into the power room to disable them. While doing so, She is brutally stabbed to death by the same canewielding figure. Later, the pool lights do come on, but Slaters body is no longer in the pool. The girls speculate about what could have happened to both Stevie and the body.Deciding that Slater must still be alive, Vicki orders the girls to search for her. Morgan enters Slaters room where Slaters trussedup body falls on her from the attic. She is joined by the sisters, and Vickie suggests hiding the body in the old cemetery. Morgan runs crying to her room where she is stabbed to death by the killer with Slaters cane. Meanwhile, Katey goes into the attic and discovers childrens toys, a clown statue, and a dead bloodied bird laying in its cage. Diane is waiting in her van for the other girls, but the murderer stabs her to death through the sunroof. Jeanie, the most nervous member of the group, is attacked while running back to the house, but manages to escape. After informing Katey about the attack, Jeanie arms herself with a chefs knife and is chased into the upstairs bathroom. As she hide in a stall, the killer enters the bathroom and looks for in each stall. As the killer reaches the last stall, Jeanie bursts out of the stall to attack but gets decapitated by her own knife when the killer gains the upper hand. ........

Source: Wikipedia