Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.
| Title | Time | |
|---|---|---|
| 1 | You're Doomed | 2016-01-22 |
| 2 | We Still Have a Chance | 2016-01-23 |
| 3 | We Can Prevent the Killings | 2016-01-29 |
| 4 | We Found the Killer | 2016-01-30 |
| 5 | Changing the Past Alters the Present | 2016-02-05 |
| 6 | Catch Him by All Means | 2016-02-06 |
| 7 | We Must Dig Deeper | 2016-02-12 |
| 8 | How Are You Alive? | 2016-02-13 |
| 9 | Hongwon-dong Case | 2016-02-19 |
| 10 | Someone Has to Stop the Bad Guys | 2016-02-20 |
| 11 | The One Last Case | 2016-02-26 |
| 12 | The Case Was Manipulated | 2016-02-27 |
| 13 | The Real Assailant | 2016-03-04 |
| 14 | Not Now, but Maybe in the Past | 2016-03-05 |
| 15 | Is It Really You? | 2016-03-11 |
| 16 | If You Don't Give Up | 2016-03-12 |
