Impoverished Peter Plunkett hatches the perfect plan to save his debt-ridden Irish castle: lure American tourists by advertising the place as haunted! But when Peter and his wacky staff don sheets and chains to go a-haunting, they scare up more than paying guests ... they arouse the real ghosts of Castle Plunkett, as moldy and murderous a crew of spooks who ever terrorized the Celtic countryside. Or fell in love with a mortal.