Rome, 1976. Valerio is ten years old and has a lively imagination. His life as a child is turned upside down when, with his mother Gina, he witnesses an attack on his father Alfonso by a terrorist group. From that moment on, fear and a sense of vulnerability leave a dramatic mark on the feelings of the whole family. But it is precisely in those difficult days that Valerio gets to know Christian, a boy not much older than him. Solitary, rebellious and shameless, he seems to have appeared out of nowhere. That meeting, in a summer filled with discoveries, will change their lives forever.