At Hamilton High School's 1957 prom, students Lisa and Brad leave the festivities to have sex in Brad's car. Before the two can undress, they are distracted by a noise, revealed to be someone putting candles on the hood of the car. After spotting the candles, Lisa has her throat slashed by a metal crucifix, wielded by psychotic religious fanatic, Father Jonas; he then stabs Brad in the chest before igniting the car in flames. After committing this double homicide, Father Jonas reveals he had suffered Catholic Church sexual abuse cases in the church, and displays stigmata. He is transported from St. Basil Seminary to the St. George Church by a group of fellow priests led by Father Jaeger, who refers to the rambling Father Jonas as an abomination and believes him possessed by dark forces.