On the 20th anniversary of the brutal Christmas Eve murders at St. Agnes Church, a demonic preacher from the past returns to haunt the residents of the same town. Among them is Salem, a young man whose once happy life is torn from him piece by piece because he is forced to commit an unspeakable crime. The only one who believes his innocence is a heartbroken girl (Alexis Knapp) who is having her own nightmares. Together and apart, they have to face their own demons as well as their real demon, called Mr. Monday.