Cosmos and Niner live on the street. It’s not such a bad life, they think, but they dream of going to the sea, where it’s always summer. And to do that they need to raise money. Cosmos knows a woman who might be able to help them. When she asks them to exchange something precious for the money, Niner and Cosmos agree to trade her the most valuable thing either of them possesses—Niner’s guardian angel. After the deal is struck, Cosmos and Niner quickly set out for the shore. But when Niner’s health takes a turn for the worse, Cosmos realizes he needs to get Niner’s guardian angel back. Can he act quickly enough to save his young friend’s life?