It all starts when Stripe, the main character, first hatches from an egg. He begins his life by eating the leaf he was born on. He realizes that there must be "more" to life than just eating leaves. He senses there must be a way to get up into the sky. He searches for a way and finds himself at the base of a pillar made up of caterpillars. They are all struggling to get up into the sky as well. Here he meets Yellow who also wants to get up into the sky by climbing to the top of the pillar. But she feels bad about what must be done to achieve this goal.