Who was he? I felt like I knew him but every time I tried to think I drew a blank. Park Jia spent a night with Kim Mingyu and it was one of the best nights of her life, but afterward she learned she was pregnant. Mingyu wants to support her in every way possible, he's fallen in love with her. After a tragedy and her accident she comes to forget him. But he refuses to let her. Will they be able to over come these obstacles and find one another again?