456 is the comical and violent story of a family that, isolated and closed, lives in the middle of a valley beyond which they sense the unknown. Father, mother and son are ignorant, distrustful, nervous. They hurl accusations, they top up a tomato sauce left by their grandmother who died years before, they argue, they pray, they hate each other. Each of the three represents for the others the most detestable thing in the world. And yet a truce is needed, because a long-awaited guest is arriving, who can and must change their future. Everything is ready, everything is perfect. But the truce will not last