Jae-jun delivers letters to heaven from those who can't get over the loss of their loved ones. One day Ha-na, 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.
| Writing | Eriko Kitagawa | Writer |
| Production | Shin Hyun-Taek | Producer |
| Production | Ko Dae-Jung | Producer |
| Editing | Sungok Kim | Colorist |
| Camera | Jin Jin | Director of Photography |
| Directing | Lee Hyung-min | Director |
| Art | Park Jae-wan | Props |
| Crew | Park Ju-chun | Martial Arts Choreographer |