In the 11th annual Halloween trilogy, a ghostly Homer tries to perform a good deed on Earth; Bart and Lisa are trapped in a fairy-tale forest; and dolphins revolt against humans after Lisa frees their king from the Springfield Marine Park.

While Krusty is signing autographs, Bart meets a girl who turns out to be Krusty's daughter. Krusty then spends a day at the beach with her and later that night he gambles away his daughter Sophie's violin. He then recruits Homer to help him get it back from Fat Tony and the Mob. Blackboard 'I will not surprise the incontinent'.