The tale of a workaholic dad-turned-dog who finds that being man's best friend shows him the most important job - being a great dad.

Through an ancient spell, a boy changes into a sheepdog and back again. It seems to happen at inopportune times and the spell can only be broken by an act of bravery....

Preteen Moochie Daniels just wants a dog, but his dad, Daniel, is allergic to canines, like Bundles, the shabby sheep dog of neighbor Charlie Mulvihill who secretly trained his pet to help him steal jewels. Mooch's big brother Wilbert 'Wilby' is smart, shy and a promising inventor, but hopelessly clumsy when it comes to girls, and is jealous of his slick mate Trey who has no problems. Desperate Wilby resorts to a spell from the ring of Lucrezia Borgia (he accidentally got from dad's museum of curiosities), which magically turns him into Bundles and back at uncontrollable times. This is how he also knows that the diamond on loan in his father's museum is Charlie's next target.

The Return of the Shaggy Dog is a 1987 two-part television movie midquel to the 1959 feature film, The Shaggy Dog, set before the events of The Shaggy D.A..

Reminiscences by the kids from the original 1959 Disney film.