Who says there are no such things as ghosts? The citizens of Friendship, Maine, have long suspected that the abandoned and desolate Whipstaff Manor is haunted.

Then, one day, two new visitors show up on the doorstep of the drafty old mansion: Kat Harvey and her eccentric dad, Dr. James Harvey, a self-styled “ghost therapist.” Whipstaff’s scheming owner, Carrigan Crittenden, has hired Dr. Harvey to exorcise the house’s live-in apparitions–a friendly but lonely young ghost named Casper and his three incorrigibly odious uncles, Stretch, Stinkie and Fatso–so that she can get her hands on the macabre manor’s fabled treasure. Unfortunately for Dr. Harvey, the spectral uncles, who lead dysfunctional afterlives, will not tolerate “fleshies” in their house. What’s more, the Ghostly Trio have their own methods of getting rid of unwanted visitors–and a certifiably twisted sense of humor.