Arthur lived with Melanie and her family. When a new dog, Bonzer, came to stay, Arthur felt jealous because Bonzer could do things better than him. One day, Melanie took Bonzer to the park but left Arthur behind. Upset, Arthur ran away with his favorite slippers. The family searched for Arthur and eventually found him at the pet store. Melanie was happy to be reunited with Arthur and told him that she would always love him.