After failing to properly perform an feline transfiguration spell, Twilight now finds herself turning into a kitten at uncontrollable and unpredictable intervals. And when in her kitten form she finds herself craving seafood and creamy milk, belly rubs and napping. Desperate for her life to get back to normal, she goes to the princesses for help. But between Luna's unrelenting neediness to snuggle her, tease her with laser pointers, catnip mouses and balls of cotton, and Celestia's free time being spent to prepare for foreign dignitaries, she soon loses hope of getting back to normal anytime soon.