Leah loves her home - a ramshackle farmyard perched on the cliff top overlooking White Horse Bay. There's nothing Leah likes better than going for hacks through the countryside on her pony Nutmeg, searching for adventures... Animal-mad Amy has just moved to White Horse Bay, and first meets Leah when she visits her parents' farm to give riding a try. The girls don't get along to start with, but when Amy finds a young dog stranded on a cliff-edge they join forces to help him. With a storm approaching, will the girls be able to rescue the dog in time? It's Animal S.O.S. to the rescue!