Dad and his new girlfriend are out for dinner, leaving little Max and Julia arguing over what to watch for movie night. Someone doesn't care about movie night and that's the sex crazed babysitter with plans of her own. Unsupervised the two kids accidentally watch "The Exorcist". When strange moans emerge from the master bedroom the siblings reach the conclusion that their new babysitter is demonically possessed. Will the kids put aside their differences to vanquish the demon?