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🔔 Notify me about new seasonsSynopsis
A reclusive ex-cop reenters the game as an insurance investigator, searching for clues in crime scenes perfectly staged by a serial killer in her midst.
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Episodes
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- E1 Episode 1Next upOct 30, 2021 · 72 min
Synopsis

In need of a big win at work, Na Je-hui plays on Koo Kyung-yi's strengths and weaknesses to enlist her help on a missing person's case.
Guest stars: Choi Young-jun (Jang Seong-u), Kim Kang-hyun (Kim Min-gyu), Park Ye-yeong (Yoon Jae-yeong), Jeon Seok-chan ([Detective]), Ahn Ryeo-jin (Escort (Eps 1, 2))
- E2 Episode 2Oct 31, 2021 · 74 min
Synopsis

Kyung-yi suspects there's more to this accident than meets the eye. Reuniting with an old classmate, Song Yi-kyung hears about a former teacher's fate.
Guest stars: Bae Hae-sun (Jung Jeong-yeon), Choi Young-jun (Jang Seong-u), Kim Kang-hyun (Kim Min-gyu), Park Ye-yeong (Yoon Jae-yeong), Jeong Seok-yong (Mr. Kim), Park Ji-bin (Heo Hyeon-tae), Jeon Seok-chan ([Detective]), Ahn Ryeo-jin (Escort (Eps 1, 2))
- E3 Episode 3Nov 6, 2021 · 71 min
Synopsis

A news story about a criminal's light sentence establishes the next target for "K," who sets the scene at a bustling university campus.
Guest stars: Bae Hae-sun (Jung Jeong-yeon), Choi Young-jun (Jang Seong-u), Jeong Seok-yong (Mr. Kim), Jeong Jong-jun (Je-hui's father), Park Kang-seop (Lee Dae-ho)
- E4 Episode 4Nov 7, 2021 · 69 min
Synopsis

Santa's chase after "K" puts the team on high alert, especially Kyung-yi. A spooked co-conspirator distances himself from the criminal mastermind.
Guest stars: Bae Hae-sun (Jung Jeong-yeon), Choi Young-jun (Jang Seong-u), Park Ye-yeong (Yoon Jae-yeong), Jeong Seok-yong (Mr. Kim), Jeong Jong-jun (Je-hui's father), Park Kang-seop (Lee Dae-ho), Han Seung-yoon ([Policeman])
- E5 Episode 5Nov 13, 2021 · 64 min
Synopsis

Jung Jeong-yeon thinks back to a traumatic incident in her niece's past. Following a hunch that "K" might leave the country, Kyung-yi's team sets a trap.
Guest stars: Bae Hae-sun (Jung Jeong-yeon), Jeong Seok-yong (Mr. Kim), Park Ji-bin (Heo Hyeon-tae), Jeong Jong-jun (Je-hui's father), Choi Dae-chul (Heo Seong-tae), Park Ye-ni (Yi-kyung's mother)
- E6 Episode 6Nov 14, 2021 · 74 min
Synopsis

Kyung-yi sifts through Yi-kyung's playbooks to find out the next target. An outcast's account takes the team to an IT company headed by a public figure.
Guest stars: Choi Young-jun (Jang Seong-u), Kim Kang-hyun (Kim Min-gyu), Jeong Seok-yong (Mr. Kim), Park Kang-seop (Lee Dae-ho), Kim Soo-ro (Ko Dam)
- E7 Episode 7Nov 20, 2021 · 66 min
Synopsis

In a high-stakes game of cat and mouse, Kyung-yi tries to find and stop the deadly plans Yi-kyung has set in place for Ko Dam's public event.
Guest stars: Bae Hae-sun (Jung Jeong-yeon), Jeong Seok-yong (Mr. Kim), Jeong Jong-jun (Je-hui's father), Park Kang-seop (Lee Dae-ho), Kim Soo-ro (Ko Dam)
- E8 Episode 8Nov 21, 2021 · 69 min
Synopsis

Yi-kyung's loss plunges her into a world of reckless darkness. Both Yi-kyung and Kyung-yi seek answers on the inexplicable outcome of the event.
Guest stars: Bae Hae-sun (Jung Jeong-yeon), Jeong Seok-yong (Mr. Kim), Jeong Jong-jun (Je-hui's father), Park Kang-seop (Lee Dae-ho), Choi Dae-chul (Heo Seong-tae), Kim Soo-ro (Ko Dam), Jeong Yoon-hee (Na Je-Hui's Colleague (Eps 8))
- E9 Episode 9Dec 4, 2021 · 73 min
Synopsis

Yi-kyung joins hands with Yong-suk, replacing a down-in-the-dumps Kyung-yi who falls out of favor with the strong-handed director.
Guest stars: Jeong Seok-yong (Mr. Kim), Park Ji-bin (Heo Hyeon-tae), Jeong Jong-jun (Je-hui's father), Park Kang-seop (Lee Dae-ho), Choi Dae-chul (Heo Seong-tae), Kim Ki-cheon (Gardener)
- E10 Episode 10Dec 5, 2021 · 64 min
Synopsis

Kyung-yi inches closer to finding out the truth behind the boat party. Yi-kyung tries to escape the suffocating grasp of Yong-suk's control.
Guest stars: Kim Kang-hyun (Kim Min-gyu), Jeong Seok-yong (Mr. Kim), Park Ji-bin (Heo Hyeon-tae), Jeong Jong-jun (Je-hui's father), Park Kang-seop (Lee Dae-ho), Choi Dae-chul (Heo Seong-tae), Kim Soo-ro (Ko Dam), Kim Ki-cheon (Gardener)
- E11 Episode 11Dec 11, 2021 · 64 min
Synopsis

Yong-suk begs for Kyung-yi's help after a video of the yacht party is leaked. Yi-kyung taps a member of Kyung-yi's team for a covert collaboration.
Guest stars: Choi Young-jun (Jang Seong-u), Kim Kang-hyun (Kim Min-gyu), Park Ye-yeong (Yoon Jae-yeong), Jeong Seok-yong (Mr. Kim), Park Ji-bin (Heo Hyeon-tae), Jeong Jong-jun (Je-hui's father), Choi Dae-chul (Heo Seong-tae), Kang Ro-chae (Blackmailed Person)
- E12 Episode 12Dec 12, 2021 · 66 min
Synopsis

Santa is held hostage by Yi-kyung, who reveals his identity to a disbelieving Kyung-yi. Yong-suk's plans blow up in her face.
Guest stars: Jeong Seok-yong (Mr. Kim), Park Ji-bin (Heo Hyeon-tae), Jeong Jong-jun (Je-hui's father), Park Kang-seop (Lee Dae-ho), Choi Dae-chul (Heo Seong-tae), Kang Ro-chae (Blackmailed Person)
Cast & crew
Created by Seong Choy
Videos
Trailers
Images · 9
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Reviews · from TMDB members
ParkMinSep 25, 2023
I really appreciate its style but the plot was sacrificing way too much in favor of its supposed black comedy. Sure the drama had its high moments where the comedy really shined but the endless 12 episodes chase was exhausting and poorly executed. At least there's more to like about it, the drama had a good selection of soundtracks that amplified its stylistic moments. I wish this drama was a movie, it would have been a lot more fitting for what it had to offer. Anyway, the d… Read more
rama seems to be an accurate representation of Lee Young Ae's long hiatuses.
samsalabämMay 12, 2026
You don't get too many korean shows with a cool and clever female lead. Inspector Koo is one of this rare diamonds where a women isn't just the female love interest. I really would love to watch a second season. There is crime and murder and a bit of nerdy stuff. I enjoyed it a lot.
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Lee Young-ae
Kim Hye-jun
Kim Hae-sook
Kwak Sun-young
Baek Sung-chul
Cho Hyun-chul
Lee Hong-nae












