Peter is an ordinary boy . . . sometimes. Then one day he decides to become a cat. He purrs. He pounces on unsuspecting prey. He discovers the joy of yarn. And he's an expert at climbing up curtains.

While Peter is good at being a kitty, he is not always a good kitty. His parents want their human son back! What's a cat to do? Soon Peter finds an ideal solution to please both man and beast.