A group of Kurds and several illegal Afghanis work on a construction site in Teheran. Among them is Najaf, a widower with a large family. When he injures his leg, his son Rahmat replaces him at work. Seeing how fragile and weak the boy is, a supervisor puts the stronger Lateef in Rahmat’s position. Because of the new job, Lateef treats Rahmat with cruelty but soon he realizes the boy’s secret…