Kitty thinks she might be a unicorn. She feels so perfectly unicorn-y! "Neigh!" says Kitty. But when Unicorn clop clop clops over, sweeping his magnificent tail and neighing a mighty neigh, Kitty feels no bigger than a ball of lint. Can this unlikely pair embrace who they are and truly see one another?

Unicorn is perfect-everybody thinks so. He yearns to look the way everyone thinks he should. But when a fumble makes Unicorn feel like a big, ugly goof, he can't help but wonder: If he's not absolutely perfect and majestic all the time, will Kitty even want to be his best friend anymore? The magical bestselling team of Shannon Hale and LeUyen Pham put their horns together once again for a heart-bursting story featuring an utterly adorable kitty-corn...

Kitty helps her best friend Unicorn accomplish his dream of being a mermaid, but despite an elaborate DIY mermaid tail, the friends' trip to the beach does not go as planned and Unicorn's insecurities ermerge.