In Friendship, Maine, Whipstaff Manor has been inherited by a neurotic, spoiled woman named Carrigan Crittenden as explained to her and her attorney Paul “Dibs” Plutzker by her father’s lawyer Rugg. An invisible ink encryption in the will reveals that a treasure is hidden somewhere in the manor, inspiring Carrigan and Dibs to investigate. They are greeted by a friendly but lonely ghost named Casper), but their resulting panic summons Casper’s three obnoxious uncles: Stretch, Stinkie and Fatso. Carrigan and Dibs hire a series of professionals – including Father Guido Sarducci and Raymond Stantz – in an attempt to rid themselves of the ghosts, but to no avail.