Ki Moo-Hyeok, a lawyer with a high winning rate, only cares about money. Due to a murder case at a high school which he deals with, his reputation as a lawyer hits rock bottom. To regain his good name as a lawyer, he sneaks into the high school and work as a temporary teacher. He tries to reveal a secret which the students have, and gets involved with Teacher Ha So-Hyun, a P.E. teacher who loves her students. They then face the students'secret.
| Title | Time | |
|---|---|---|
| 1 | The Beginning of the Attempted Murder Case | 2019-07-17 |
| 2 | Gi Mu Hyeok Returns As a Teacher | 2019-07-18 |
| 3 | Byung Ho Gets Bullied | 2019-07-24 |
| 4 | The Chauffeur | 2019-07-25 |
| 5 | The Secret Sysop | 2019-07-31 |
| 6 | Ye Ri’s Trap | 2019-08-01 |
| 7 | Tae Ra’s Recital | 2019-08-07 |
| 8 | Class Two’s New Homeroom Teacher | 2019-08-08 |
| 9 | Spy App | 2019-08-14 |
| 10 | Tae Seok’s Death | 2019-08-15 |
| 11 | Restoring Beom Jin’s Phone | 2019-08-21 |
| 12 | Han Su Wakes up from a Coma | 2019-08-22 |
| 13 | Han Su’s False Testimony | 2019-08-28 |
| 14 | Su Ah’s Mail | 2019-08-29 |
| 15 | The Big Blow | 2019-09-04 |
| 16 | Beom Jin Stands as a Witness | 2019-09-05 |
