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Now playing: Season 1, Episode 1 — Episode 1
A never-before-seen inspector.
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.
1. Episode 1
2021-10-30
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.
2. Episode 2
2021-10-31
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.
3. Episode 3
2021-11-06
A news story about a criminal's light sentence establishes the next target for "K," who sets the scene at a bustling university campus.
4. Episode 4
2021-11-07
Santa's chase after "K" puts the team on high alert, especially Kyung-yi. A spooked co-conspirator distances himself from the criminal mastermind.
5. Episode 5
2021-11-13
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.
6. Episode 6
2021-11-14
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.
7. Episode 7
2021-11-20
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.
8. Episode 8
2021-11-21
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.
9. Episode 9
2021-12-04
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.
10. Episode 10
2021-12-05
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.
11. Episode 11
2021-12-11
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.
12. Episode 12
2021-12-12
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.
Lee Young-ae
Koo Kyung-yi
Kim Hye-jun
Song Yi-kyung / "K"
Kim Hae-sook
Director Yong
Kwak Sun-young
Na Je-hui
Baek Sung-chul
Santa
Cho Hyun-chul
Oh Gyeong-su
Lee Hong-nae
An Geon-uk
