After finishing the course of junior high school, Kazuo comes up to Tokyo, leaving his mother alone in the unproductive northern district. He finds a job in a small laundry in downtown Tokyo and works hard till late at night. At a nearby restaurant a brother and sister are working, and Kazuo becomes friendly with the girl, Yoneko. Love blossoms between the two. However, Yoneko's brother objects to his sister marrying Kazuo.