Son of Zayandeh Rud

A guy kicks his little kid out. After a bunch of drama, the mother also gets separated from the kid. A farmer ends up taking in the little one, and by sheer coincidence, the mom becomes a teacher at the school in that exact village where her kid goes to school, and that's how she finds him again. Years later, the guy decides to track down his wife and kid, goes to the village, recognizes his wife, gets his son back, and starts a fresh new life with his family.