The two discover the bodies of Stevie, Morgan and Diane in the pool. Beck who soon arrives and asks Katey where Slater is.
Katey tells Peter to go home and finds a number card that once belonged to Mrs. The party goers finally depart, leaving Katey and Peter in the house. However, after informing Katey about the attack, Jeanie is chased into the upstairs bathroom and killed. Jeanie, the most nervous member of the group, is also attacked but manages to escape. The sister Diane is killed while waiting in her van for the other girls. Meanwhile Katey explores the attic of the house and discovers several children's toys. Having found Slater's body, the sisters decide to bury it in a nearby graveyard. Morgan, an attractive yet not-so-bright sister, hides in her room where she is murdered. The sorority sisters then find Slater's body which has mysteriously been moved to the attic, from whence it falls. Sorority sister Katey meets her date for the party, Peter, with whom she neglects as the other girls worry why Stevie hasn't returned from the power room yet. Later, to prevent the pool lights from coming on revealing Slater's body, Stevie, one of the sorority sisters is forced to go into the power room of the house located in the basement. When other guests attempt to throw a girl in the pool, they are stopped by the sorority sisters. As the party begins, a guest wanders around the pool and is subsequently impaled through the neck by an unknown figure, wielding Slater's cane, and dragged away. The girls all agree to hide Slater's body in their dirty swimming pool until a graduation party being held in the house is finished. Slater, who is known for carrying a sharp walking cane. Katey, a graduated sorority sister, is peer-pressured by her six sorority sisters into pulling a prank on their strict house mother, Mrs.