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. Mandy and James are staying with her parents at a vacation house in the Lake District when they spot a mischievous Labrador on the lawn. James's dog, Blackie, is thrilled to have found a friend, but with no identification or collar, how will the Hopes find her owner? And why does she seem so at home in the cottage?