While Phyllis Newsom and her friend Carolyn bake up yummy Halloween treats, her housemate Sam adopts Buck, an adorable Dalmatian who was hit by a car. To thank local veterinarian Hank Baxter for helping the dog, Phyllis and Carolyn bake a batch of doggie treats for his other four-legged patients. But when they arrive at the clinic, the vet is being arrested -- for the murder of his wife! Convinced that the police are barking up the wrong tree and that someone's been burying evidence, Sam begs Phyllis to help find the real killer.