Who let the dogs out...of people's cars and backyards? Some dognappers have come to town, and everybody's upset because their dogs have gone missing. Where are the dogs and how can they be brought back home? It's a mystery that only Donny, Mary Grace, and the Grandma Gang can solve. America's favorite brother and sister are back to solve a crime with the help of the Grandma Gang...and you're invited to come for the ride as they find the clues and see if they can save the dogs! It's an adventure you won't want to miss!