The Sleeper

In 1979, a giggling man with milky white eyes (credited as "The Sleeper") breaks into a bedroom in the Alpha Gamma Theta sorority house in the middle of the night, killing a resident with a hammer. Two years later, the sorority is organizing a party to welcome new pledges, an event that prompts the return of the Sleeper, who has been living on the campus in secret, spying on the Alpha Gamma Thetas, and threatening them over the phone.