Piper is a gentle dog, courageous and anxious to please. It's very unfortunate that he is bought by a grim man who tells him to 'take care of the rabbits'. Piper babysits them beautifully, which is not what his new owner meant at all, and loses him his dinner. He runs away to the big city, and saves an old lady from being run over, but he hurts his leg doing it, and the old lady is still taken to hospital. It takes persistent passers-by to find him, and take him to the vet, and all is well in the end.