"At Animal Ark, Mandy Hope helps her parents treat animals of all shapes and sizes. Even outside the clinic, Mandy can't resist helping any animal in need. When Mandy's dad diagnoses an Old English sheepdog puppy as deaf, Mandy feels sorry for it. But it isn't until she finds another sheepdog puppy weak and abandoned that she and James begin to get suspicious. Could a local breeder be mistreating these poor puppies?"--P. [4] of cover.

While helping to set up a Santaland outside Walton Cottage Hospital, Mandy and James spot a stray Jack Russell terrier. They also befriend Charlie, a young patient, who desperately wants a dog for Christmas. Can they bring the two together?

Can Mandy rescue a lost puppy from the dangers of the big city?