S1 • E1
A poorly performing police unit is assigned to a daycare building. While trying to adjust to their new office filled with kids, they are called to investigate the mysterious death of a road manager for a famous actor.
S1 • E2
The death of a famous actor's manager is initially ruled a suicide but turns into a homicide investigation. A detective feels overlooked by rookie Yubin, and begins his own search for answers as media frenzy and another death occurs.
S1 • E3
Yubin wants to release a suspect due to lack of evidence and seeks a missing witness.
S1 • E4
A fire breaks out in a chicken restaurant, and a girl is hurt and taken to the hospital. Police find signs of an attack and think it might be arson. They also discover that the girl had a stalker when they check her devices.
S1 • E5
Forensic results confirm arson for the restaurant fire. Three suspects emerge: a stalker, a fierce restaurant competitor, and a landlord. The girl wakes up but can't remember anything. A friend proposes a new theory to help crack the case.
S1 • E6
The Violent Crimes Unit shifts their investigation after new witness statements emerge and follows a lead from a key figure.
S1 • E7
A six-year-old girl is kidnapped. Amid the kidnapper's threats, Yubin dismisses a prime suspect.
S1 • E8
Another team takes over the case, but Yubin's team secretly continues probing, sparking a showdown.
S1 • E9
Armed with Tansik's clue, the team sneaks into a restricted area and faces a perilous situation.
S1 • E10
The team identifies a suspect but lacks proof. Meanwhile, time is running out for them.
S1 • E11
A woman arrested for breaking in is a romance scam victim. The team sets up a stakeout.
S1 • E12
Yubin's team baits the suspect but finds out things are not as they seem.
S1 • E13
The team takes on a cultural artifact theft case and investigates everyone with access to the house.
S1 • E14
The suspect claims someone else stole the painting. The team goes undercover to catch the culprit.
S1 • E15
Yubin's team uncovers a union of gangsters and forms the Dongbang Group to infiltrate it.
S1 • E16
Yubin's team leads a double life and manages to meet the right-hand man of the MZ Union's boss.
S1 • E17
A university student is found to have been murdered the same way Yubin's fiancée was.
S1 • E18
Hyunwoo identifies the murderer. Meanwhile, Junghwan obtains CCTV evidence but falls in danger.
S1 • E19
Joongyreok hunts down Junghwan's attacker, while Yubin discovers crucial evidence has vanished.
S1 • E20
The team trusts Yubin's claim that the real murderer is still out there, and gathers evidence.
