Famous Dog Lassie

The anime is set in a small coal-mining town in England. John, a young boy, finds a lost puppy in a flock of sheep and names her Lassie, forming a close bond with her. When the coal mine closes due to lack of resources, John's attempts to persuade the owner to investigate further result in Lassie being taken to Scotland as part of the deal. John's friend Priscilla, the owner's granddaughter, eventually helps Lassie escape and begins a long journey back to her hometown.