Molly-O Moore and her friend Pip are very happy living on The Ridge. If only they had a horse, their lives would be perfect. When a good farmer agrees to lend them his ancient horse they and all their friends are exuberant until spring comes and they know that they must return him. It is Dori, a sad-eyed refugee child, who discovers Treasure's secret and makes it possible for the Ridge children to keep him forever. Suspense and mystery is cut to size for the young reader and sustained by the irresistible charm that almost any four legged bag of bones holds for the pre-teen-ager.