Gabriele Santoro lives in a working-class neighborhood of Naples and is a piano professor. One morning, while he is shaving, a delivery man rings the doorbell, he opens the door and, before welcoming him, runs to wash his face. At that moment, a ten-year-old boy sneaks into his apartment and hides in it. “The teacher” – as he is called in the neighborhood – will only realize it late in the evening. He will recognize the intruder, Ciro, a child who lives with his parents in the same building. When asked why he escaped, Ciro does not speak. Despite that Gabriele decides to hide him in his home, engaging in a singular and tenacious challenge to Ciro’s enemies.