Prosecutor Cha Woo Jin lost his first love, Kim Seung Hee 15 years ago. He then meets a high school girl, Jo Eun Bi, who looks like his first love. Their meeting unleashed secrets and chain of events between Cha Woo Jin, Seung Hee, Jo Eun Bi, and the criminal.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | The Explosion of Bus No. 45. | 2022-01-11 | 45 min |
| Season 1 | Episode 2 | The Time Loop | 2022-01-11 | 40 min |
| Season 1 | Episode 3 | The Two Main Suspects | 2022-01-11 | 45 min |
| Season 1 | Episode 4 | Getting Out of the Loop | 2022-01-11 | 44 min |
| Season 1 | Episode 5 | The Man in the Last Seat of the Bus | 2022-01-11 | 44 min |
| Season 1 | Episode 6 | Episode 6 | 2022-01-11 | 39 min |
| Season 1 | Episode 7 | Ma Guo Qiang's Mysterious Baggage | 2022-01-12 | 47 min |
| Season 1 | Episode 8 | The Final Suspects | 2022-01-12 | 38 min |
| Season 1 | Episode 9 | Prime Suspects | 2022-01-18 | 45 min |
| Season 1 | Episode 10 | The Bomber's Accomplice | 2022-01-18 | 45 min |
| Season 1 | Episode 11 | Helping the Investigation | 2022-01-19 | 45 min |
| Season 1 | Episode 12 | Trusting the Police | 2022-01-19 | 45 min |
| Season 1 | Episode 13 | The Truth About What Happened Five Years Ago | 2022-01-19 | 45 min |
| Season 1 | Episode 14 | A Five Year Old Mystery | 2022-01-25 | 45 min |
| Season 1 | Episode 15 | Ending the Loop | 2022-01-25 | 45 min |
| Directing | Kim Yong-gyun | Director |
| Writing | Jang Hyeok-Rin | Screenplay |
| Directing | Kim Pyung Joong | Director |