'We'll be friends, you and I. I'll call you Joey, ' Albert said. 'I'll look after you. We'll always be friends, I promise.' Albert Narracott, a farmer's boy, makes this promise to his horse, Joey, in Devon, England. But this is before the First World War, and before Joey leaves for France to become a war horse. What happens to Joey in the British army? What will the Germans and the French do to him when they find him? And how will Albert find Joey...