Our Older Sister

YeonSeo Yang HaEun majors in music at an university She travels to Seoul to meet her older sister JinSeo When she arrives at her sisters house YeonSeo a large crowd and police there YeonSeo learns that her sister was found dead The police concluded that her death was a suicide YeonSeo doubts her sister took her own life and begins to investigate Detective Kim Oh GwangRok impressed by YeonSeos efforts reexamines the case