While unraveling an enigmatic murder mystery, a special force leader realizes this case is related to the incident that took 28 years ago in a small town.
| Title | Time | |
|---|---|---|
| 1 | The Forewarned Murders | 2020-11-30 |
| 2 | The Smiles | 2020-12-01 |
| 3 | The Survivors | 2020-12-07 |
| 4 | The Fire | 2020-12-08 |
| 5 | The Safe | 2020-12-14 |
| 6 | The Mutants | 2020-12-15 |
| 7 | Jung Woo Being Chased | 2020-12-21 |
| 8 | Secret Lab | 2020-12-22 |
| 9 | Kids Adopted | 2020-12-28 |
| 10 | Jung Woo Following Kids | 2020-12-29 |
| 11 | New Warning | 2021-01-04 |
| 12 | The Reunion | 2021-01-05 |
| 13 | The Secret Lab | 2021-01-11 |
| 14 | Jung Woo in Secret Lab | 2021-01-12 |
| 15 | Reunion with Mother | 2021-01-17 |
| 16 | Mother and Son | 2021-01-18 |
