Evie is overjoyed when she is given her very own puppy, Leo. Leo adores Evie - he loves to be cuddled, sleeps on her bed, and welcomes her home from school every day with a wag of his tail. But it's t long before ather new member of the family arrives: Evie's baby brother, Sam. Suddenly, one has time to take care of Leo, let alone play with him and take him for walks. Soon he finds himself unwanted and all alone.