Caterpillars Dotty and Stripe do everything together. They play, they eat leaves and do all sorts of caterpiller-y things, and then one day, after spinning themselves into snuggly cocoons, they wake up as beautiful butterflies! But soon they realise that, for the first time ever, they look different. Should Dotty only play with butterflies that look like her? And Stripe only play with butterflies that look like him?