Plot

Sean runs into an old high school friend who has become a priest. Lily gets in trouble at school because her skirt is too short causing Sean to interfere, making the situation worse. Meanwhile, Jimmy thinks he is possessed by the devil.

Sean decides to take action against his kids' school principal, Sister Helen after "Having It In" for his family, and asks his old friend turned priest to help him defeat her ; Jimmy thinks he is posessed by Satan after watching "The Exorcist" in theaters

While making a confession, Sean meets an old friend at the church who's now a priest. Sean decides to use him to fix some problems. The first of which being that Sister Helen drove Lily insane. It all started when Lily got a detention for a low cut skirt, while several other girls who wear low skirts didn't get caught. Sean and Eddie get proof and Sister Helen confronts all the girls and makes them wear the jumper and mentions that Lily's dad pointed this out. The girls then make Lily's life miserable at school to where she starts vegetating on the couch at home planning to get cats and marry Brad. Meanwhile, after Sean and Eddie were supposed to take the boys to a G movie, they snuck in to see the Exorcist causing Jimmy to later believe he's possessed by Satan.