Darla Dilly lives on the best street, in the best city, in the best country in the world. With her madcap family, her life is pretty wonderful. Especially when her mom and dad say she can get a pet!

But Darla doesn't want just any pet. She wants a perfect, special, magical pet, one that's just for her. She dreams of having a mermaid, a dragon, a unicorn. Until one day, the perfect pet finds her...