Wilf wants to be a witch's dog. His friends don't think he can as witches don't usually have dogs as pets - they have cats, spiders and bats. But when Wilf sees an advertisement for a witch's pet he decides to apply. He disguises himself as a cat which nearly works until his disguise falls apart. But Weenie the witch hasn't had any other applicants and so decides to give Wilf a try. He helps Weenie with her flying and her spells and ends up as Witch's Pet of the Year at the Annual Show.

La serie parla delle avventure quotidiane di Wilf, un cane che aspira a diventare un mago sotto la guida della strega Weenie. Insieme ai suoi amici e compagni di scuola di magia imparerà ad usare incantesimi e trucchi per risolvere sia i piccoli che i grandi problemi causati dal gatto Sly e dal rospo Tricky, ma anche da altri maghi meno amichevoli.