Season
Episodes
Episode 1
A crime unit with the lowest arrest rate gets started on its first case with its new chief, Yubin.
Episode 2
The team investigates a murder disguised as a suicide and gets in a bind as another death occurs.
Episode 3
The team advances the investigation with information from the witness. Yubin identifies the suspect.
Episode 4
A fire breaks out at a fried chicken shop run by Joongryeok's acquaintance.
Episode 5
The team narrows down the arson suspects but hits a dead end. Yubin then proposes a shocking theory.
Episode 6
Following Yubin's lead, the team pivots their investigation and uncovers new information.
Episode 7
A six-year-old girl is kidnapped. Amid the kidnapper's threats, Yubin dismisses a prime suspect.
Episode 8
Another team takes over the case, but Yubin's team secretly continues probing, sparking a showdown.
Episode 9
Armed with Tansik's clue, the team sneaks into a restricted area and faces a perilous situation.
Episode 10
The team identifies a suspect but lacks proof. Meanwhile, time is running out for them.
Episode 11
A woman arrested for breaking in is a romance scam victim. The team set up a stakeout.
Episode 12
Yubin's team baits the suspect but finds out things are not as they seem.
Episode 13
The team takes on a cultural artifact theft case and investigates everyone with access to the house.
Episode 14
The suspect claims someone else stole the painting. The team goes undercover to catch the culprit.
Episode 15
Yubin's team uncovers a union of gangsters and forms the Dongbang Group to infiltrate it.
Episode 16
Yubin's team leads a double life and manages to meet the right-hand man of the MZ Union's boss.
Episode 17
A university student is found to have been murdered the same way Yubin's fiancée was.
Episode 18
Hyunwoo identifies the murderer. Meanwhile, Junghwan obtains CCTV evidence but falls in danger.
Episode 19
Joongryeok hunts down Junghwan's attacker, while Yubin discovers crucial evidence has vanished.
Episode 20
The team trusts Yubin's claim that the real murderer is still out there, and gathers evidence.
Cast
Kim Dong-wook
Dong-Ban Yoo-bin
Park Ji-hwan
Moo Joong-ryeok
Seo Hyun-woo
Jeong Jeong-hwan
Park Se-wan
Seo Min-seo
Lee Seung-woo
Jang Tan-sik
Son Eun-seo
Jang Eun-kyeong
Kim Seung-hwa
Nam Yeong-eun
Kim Ra-on
Dong-goo
Choi Gwang-il
Kang Hui Ryong [Chief of police]