Jae-jun is a IT industry leader, but he lost his live in a car accident. Actually Jae-jun is a transparent spirit whom people can't see him with their eyes, but because of the accident, he stays in coma condition where God allows him to extend his death for 2 months and becomes a postman, delivering letters to heaven from those who can't get over the lost of their loved ones. One day, Ha-na, who writes a letter to her late boyfriend, discovers Jae-jun's secret identity. He offers her a part-time job assisting him. Slowly, Ha-na forgets her sadness feelings and falls in love with Jae-jun.
Hero as Jae-jun
Han Hyo-joo as Ha-na