Seasons & episodes
S1 · E1Episode 1 9.2 / 10 · 8 published ratings 2026-06-05 · 52 min
Inspector Na Hwa-jin steps into the chaos and takes control of a school plagued by the spoiled son of a powerful politician — to teach him a lesson.
S1 · E2Episode 2 8.4 / 10 · 7 published ratings 2026-06-05 · 57 min
With unassuming Bong Geun-dae on his side, Hwa-jin uses his special ops skills to handle a school gang and defend a student who just wants to study.
S1 · E3Episode 3 9.7 / 10 · 5 published ratings 2026-06-05 · 72 min
When a teen influencer spreads false claims about her teachers, the team's loose-cannon Inspector Im Han-rim steps in to set the record straight.
S1 · E4Episode 4 9.1 / 10 · 5 published ratings 2026-06-05 · 68 min
Choi Gang-seok weathers a political attack on his bureau. Hwa-jin's team visits an elite school to uncover why a student attacked a respected teacher.
S1 · E5Episode 5 9.8 / 10 · 5 published ratings 2026-06-05 · 66 min
When an elementary school teacher's spirit wears down under pressure, Hwa-jin steps in to be her substitute — turning the tables to solve the case.
S1 · E6Episode 6 9.0 / 10 · 5 published ratings 2026-06-05 · 69 min
Four juvenile delinquents think they're above the law — until the team takes an interest in their extracurricular crimes and gives a harsh reality check.
S1 · E7Episode 7 9.6 / 10 · 4 published ratings 2026-06-05 · 64 min
Geun-dae goes undercover to help a father find his gambling addict son. To undermine the bureau politically, Hwang Gi-tae visits a juvenile inmate.
S1 · E8Episode 8 10.0 / 10 · 4 published ratings 2026-06-05 · 60 min
After a pre-med student collapses in class, Hwa-jin investigates his obsessive mother, whose access to illicit pills hints at a larger conspiracy.
S1 · E9Episode 9 8.8 / 10 · 3 published ratings 2026-06-05 · 67 min
To help a student escape his exploitative friends, Han-rim adopts a new persona to join his circle. Cho Gyu-cheol's return puts the bureau in danger.
S1 · E10Episode 10 9.5 / 10 · 3 published ratings 2026-06-05 · 61 min
After public backlash hits the bureau, Hwa-jin and his team go rogue to expose a deadly conspiracy led by a violent student-run gang.