Lizzie and Jack Peterson love dogs, especially puppies. So it is perfect that the Petersons are a foster family for young dogs. They will adopt a pet of their own one day, but now they are happy to help puppies find just the right home. The Petersons' newest foster puppy is Rascal. He is a Jack Russell terrier, and his name fits him well. He may be small, but he can cause big trouble. Lizzie and Charles are in for a challenge. Will they be able to find someone who will care for this pesky little puppy?