 In a Halloween night, five students participates of a scavenger hunt trying to join the sorority Sigma Si and Delta Pi. They are divided in two groups, and one of them has to steal an ancient book of magic from their weird Professor Kapps. Doug Leary and Marsha Glazer break in the professor s house while he is performing a satanic ritual with a student he has just sacrificed, and Kapps attack the students, but accidentally is impaled by a spear. Marsha and Doug leaves the house and brings his staff and his book of incantation to destroy the evidences and drive to an abandoned house, where the two groups have to stay until the next morning. Meanwhile, two seniors students from the frat house have prepared pranks in the house to scare the sorority pledges. But the evil spirit of Professor Kapps possesses Doug, slashing the group of students that have to fight to survive.