Rome, 1976. 10-years-old Valerio (Mattia Garaci) witnesses together with his mother a failed assassination attempt on his father Alfonso (Pierfrancesco Favino) by a terrorist commando. From that moment on, fear and a constant sense of vulnerability dramatically mark the feelings of the whole family. That summer, Valerio meets Christian (Francesco Gheghi), a boy slightly older than him. Lonely, rebellious, and bold, he seems to have come out of nowhere. Their meeting will change his life forever.