During a college costume party, Peter prepares to initiate four new pledges into Alpha Sigma Rho. The four consist of Jeff, a boy from an opulent upbringing, Marti, an intelligent girl from a poor background, Denise, a promiscuous, heavy drinking party-girl, and Seth, a stoner and surfer from California. The group are forced to spend the night in Garth Manor, an abandoned mansion once owned by a man named Ramon Garth, who murdered his wife and three deformed children; following the murders, Garth hanged himself. While Garth had a fourth child, Andrew, his body was never found and legend states that Andrew still lurks within the mansion.