Pietro, a city boy who visits the tiny mountain village of Grana with his mother one summer, meets a local herder boy, Bruno. Both 11 years old, they become friends over ensuing summer trips. Years later, Pietro's father dies, leaving him a remote plot of land high on the mountain. He reunites with Bruno to rebuild a collapsed house there, rekindling his connection to the mountain and his friendship with Bruno, which continues as they navigate life, dreams, and relationships.