A self-supporting student injured during the 4. 19 Student Uprising gets help from an woman of his senior, a mistress at a night club. They fall in love with each other. Meanwhile, he becomes a private tutor for a rich family, and his student falls madly in love with him. But he has not wavered a bit. To get him to marry their daughter, the rich family throws a party and invites the mistress. They divulge her background in front of all the guests. Humiliated, the mistress runs away from the house and dies in a car accident.