Sabrina realizes that Mr. Weatherbee has been harassing Harvey due to jealousy of his hair, so Cousin Ambrose conjures up a magical elixir that grows hair.
Miss Della puts Sabrina under the care of Aunt Nagatha, and Aunt Zelda's only chance of reclaiming guardianship is by performing one heartless deed before sundown.
In hopes of removing an ordinance forbidding horse labor, Sabrina grants Rocky the ability to speak, but the horse strikes up conversations with everyone in sight.