Grandpa Joe and his little great grandson Joe Joe, spend the afternoon in the park where Grandpa plays cribbage with his friends. It seems he can’t win for losing; his two friends seem to always be lucky. On the way home they watch a dog outside a shop, which seems to have x-ray vision barking before a person would come out of the shop. They feed him a little meat and he follows them home. Mother agrees to let them keep him for one day to see how it works out and because of his amazing skill grandpa decides to call him X-ray. Grandpa decides to teach the dog a trick so that he can win over his friends in the park.