"Postman to Heaven" is a co-production between South Korea and Japan. Jae-jun (K-pop band TVXQ member Hero) delivers letters to heaven from those who can't get over the loss of their loved ones. One day Ha-na (Han Hyo-joo), who writes to her late boyfriend, discovers Jae-jun's secret identity. He offers her a part-time job assisting him, and they set off on a 14-day journey.