A boy made of paper named Carta has been traveling alone in a cardboard box he calls home. Gusts of wind constantly sweep it from place to place but the repetition of a solo routine bores him. One day, the box is separated from Carta in the middle of a cramped city. He then meets a strange, ragtag group of friends who offer to help him get back to his home. As they venture up an alley to reach Carta’s box, they explore acts of friendship that fascinate Carta who never having experienced life among others begins to enjoy their company.