1x1 - Appear

February 19, 2021

When young hotshot Han Ju-won arrives in town, he's assigned to partner with Lee Dong-sik, a maverick cop with a gruesome tragedy in his past.

1x2 - Disappear

February 20, 2021

The discovery of an unidentified human skeleton raises unsettling possibilities. Dong-sik drags Kang Min-jeong back to town from a Seoul night club.

1x3 - Smiled

February 26, 2021

Ju-won's suspicions about Dong-sik's involvement in the case intensify. The emergence of a mysterious cellphone places Ju-won in a tight spot.

1x5 - The Deceit

March 5, 2021

A fight breaks out as Dong-sik prevents Kang Jin-muk from being taken advantage of. Oh Ji-hun is confronted about the night of the disappearance.

1x6 - To Deceive

March 6, 2021

Ju-won agrees to Jin-muk's request to carry out his own unofficial investigation. Do Hae-won moves to put an end to the case and protect her son.

1x7 - The Text Messages

March 12, 2021

Park Jeong-je does the right thing. The arrival of a second text from Min-jeong points Dong-sik toward someone who's figured out the truth.

1x8 - The Arrest and Interrogation

March 13, 2021

News of the killer's arrest scandalizes the town. The killer refuses to speak to anyone but Dong-sik and Ju-won. Their interrogation hits a nerve.

1x9 - Bodies Found

March 19, 2021

Following a clue from an old video, Dong-sik searches desperately for his sister's remains. Ju-won and Jae-i each return after three months away.

1x10 - Interrogating the Chief

March 20, 2021

Seeing CCTV footage, Dong-sik is convinced he's figured out the real culprit behind the killer's death. Ju-won puts a GPS tracker on Nam Sang-bae.

1x11 - Who Killed Sang-bae?

March 26, 2021

Committed to getting to the bottom of the latest murder, the team pulls together — and considers two of their own as prime suspects.

1x12 - Jeong-je and the Deer

March 27, 2021

The truth behind the events from the night of Lee Yu-yeon's death begins to unravel. Jeong-je struggles to remember what happened.

1x13 - The Next Commissioner General

April 2, 2021

As detectives begin to connect the dots, Han Ki-hwan's ties to the case become clearer. Dong-sik asks Ju-won if he can trust him.

1x14 - Setting the Trap

April 3, 2021

Dong-sik listens in on a conversation that brings to light many long-held secrets. A determined Ju-won sets out to uncover further truths.

1x15 - Letting Go

April 9, 2021

After obtaining an astonishing audio recording, Ju-won resolves to pursue justice at any cost. Dong-sik and Ju-won question Lee Chang-jin.

1x16 - Catch

April 10, 2021

In the aftermath of another sudden killing, Dong-sik joins hands with Ju-won to bring down the guilty — and deliver necessary punishment.

1x17 - Episode 17

April 16, 2021

1x18 - Episode 18

April 17, 2021

1x19 - Episode 19

April 23, 2021

1x20 - Episode 20

April 24, 2021

1x21 - Episode 21

April 30, 2021

1x22 - Episode 22

May 1, 2021

1x23 - Episode 23

May 7, 2021