At eight months pregnant, Mun-hi tries to kill herself but she is saved by the police. She goes to Mary's Home. Mary's Home is where unwed mothers live with nuns to repent their immoderate lives and try to find new lives. Earlier, Mun-hi, a college student, meets Se-hun who is studying for the bar exam. Mun-hi supports him and becomes pregnant with his child but Se-hun marries ...