Scooby-Doo and the gang visit Velma's sister at the Whirlen Merlin Magic Academy and try to save the school by solving a mystery involving a greedy ice cream mogul and a gryphon that is terrorizing the students.

Evil banker Rachel Bitterman forecloses on the Muppets' famous variety theater. But Bitterman's machinations take a back seat when apprentice guardian angel Daniel shows Kermit what conditions would have been had Kermit never existed. A Kermit-less world would have found Miss Piggy running a fraudulent psychic hotline, Fozzie Bear as a homeless derelict, and Sam the Eagle as a caged "rave" dancer. With showstopping numbers like Moulin Scrooge and...