The horror/comedy tells of a sentient carousel unicorn that gets pushed too far por a brat. The unicorn breaks free of his spinning prison to go on a revenge-driven murder spree on his way to kill the kid.
A fraternity house throws their big "Winter Luau" party but when fraternity brothers and coeds begin dying horrible deaths they discover an evil entity has taken over the house.
Friedkin, a legendary raconteur, leads a tour that moves from the infamous Exorcist steps in Georgetown to Italy, where he meets with the 91-year-old Father Gabriele Amorth, and accompanies Amorth on one of his harrowing house calls.