Kim Seo-Jin is a man who is driven only to achieve success in his life. Thanks to his efforts, he is the youngest executive at his company. His life is perfect, with his beautiful violinist wife Kang Hyun-Chae and a daughter. His wonderful life comes to a halt when his young daughter is kidnapped. He falls deep into despair. To change the past, when his daughter was kidnapped, he contacts Han Ae-Ri approximately one month in the past. Han Ae-Ri has busy days with her studies and working a part-time job to make enough money to pay for her sick mother's operation. One day, her mother suddenly goes missing. Han Ae-Ri falls into despair, when Kim Seo-Jin from the future contacts her.
| Title | Time | |
|---|---|---|
| 1 | Disappeared | 2020-10-26 |
| 2 | Devastated | 2020-10-26 |
| 3 | Call from the Future | 2020-10-27 |
| 4 | Prove It To Me! | 2020-10-27 |
| 5 | The Kidnapper | 2020-11-02 |
| 6 | The Murderer | 2020-11-02 |
| 7 | The Chase | 2020-11-03 |
| 8 | The Mole | 2020-11-03 |
| 9 | The Suspicion | 2020-11-10 |
| 10 | The Crucial Place | 2020-11-10 |
| 11 | The Dead Body | 2020-11-16 |
| 12 | The Murder | 2020-11-16 |
| 13 | Kim Jin Ho Takes His Life | 2020-11-24 |
| 14 | The Clues | 2020-11-24 |
| 15 | The Gap | 2020-11-24 |
| 16 | The Arrest | 2020-11-24 |
| 17 | The Cost of Happiness | 2020-11-30 |
| 18 | The Only Hope | 2020-11-30 |
| 19 | Victim's Message | 2020-12-01 |
| 20 | Ae Ri's Guess | 2020-12-01 |
| 21 | The Assistance | 2020-12-07 |
| 22 | Seo Jin's Plan | 2020-12-07 |
| 23 | Ae Ri's Death | 2020-12-08 |
| 24 | A Phone Call | 2020-12-08 |
| 25 | Song Ja Goes Missing | 2020-12-14 |
| 26 | Seo Jin Gets Arrested | 2020-12-14 |
| 27 | Do Kyun Threatens Seo Jin | 2020-12-15 |
| 28 | Hyun Chae Tries to Take Her Revenge | 2020-12-15 |
| 29 | One Mishap After Another | 2020-12-21 |
| 30 | The Package | 2020-12-21 |
| 31 | The Sacrifice | 2020-12-22 |
| 32 | The Last Call | 2020-12-22 |
