The Story of Park's Marriage Contract

Ho Won is a young woman who struggles to find a steady job. Tired and hopeless, she attempted suicide. Hospital check-up discovers she might have terminal illness. Soon after, a furniture company accepts her as a contract worker. Faced with a possibility of dying, Ho Won decides to just let herself loose. Her newfound bold attitude puts her at odds with her workaholic manager Woo Jin.

Kim Jinseo and Mo Yoonhee are high school classmates and rivals whose different family backgrounds shaped their characters and their paths towards love and success in adulthood. Jinseo develops a warm and cheerful personality as well as superior intellectual ability, while Yoonhee becomes a beautiful woman with fatal charm. Both women love Lee Sanghyun, an extremely kind but indecisive man who used to date Yoonhee but later married Jinseo. When Yoonhee's husband, Sung Eunpil, dies under suspicious circumstances, Jinseo finds herself becoming involved in the investigation. The process is complicated when the young homicide detective Kang Shinwoo becomes romantically interested in Jinseo.