A mystery evil thriller which finds the truth of a recording tape containing mysterious serial killings and unidentified sounds in a small city.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Episode 1 | 2021-09-22 | 90 min |
| Season 1 | Episode 2 | Episode 2 | 2021-09-23 | 90 min |
| Season 1 | Episode 3 | Episode 3 | 2021-09-29 | 90 min |
| Season 1 | Episode 4 | Episode 4 | 2021-09-30 | 90 min |
| Season 1 | Episode 5 | Episode 5 | 2021-10-06 | 90 min |
| Season 1 | Episode 6 | Episode 6 | 2021-10-07 | 90 min |
| Season 1 | Episode 7 | Episode 7 | 2021-10-13 | 90 min |
| Season 1 | Episode 8 | Episode 8 | 2021-10-14 | 90 min |
| Season 1 | Episode 9 | Episode 9 | 2021-10-20 | 90 min |
| Season 1 | Episode 10 | Episode 10 | 2021-10-21 | 90 min |
| Season 1 | Episode 11 | Episode 11 | 2021-10-27 | 90 min |
| Season 1 | Episode 12 | Episode 12 | 2021-10-28 | 90 min |
| Directing | Park Hyeon-seok | Director |
| Writing | Cho Hyun-hoon | Writer |
