Season 1

01 Appear Episode 119th February 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. 02 Disappear Episode 220th February 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. 03 Smiled Episode 326th February 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. 04 Cried Episode 427th February 2021 Coming up empty with Dong-sik's interrogation, the police root around Yoo Jae-i's butcher shop. Ju-won makes an explosive statement to the public. 05 The Deceit Episode 55th March 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. 06 To Deceive Episode 66th March 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. 07 The Text Messages Episode 712th March 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. 08 The Arrest and Interrogation Episode 813th March 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. 09 Bodies Found Episode 919th March 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. 10 Interrogating the Chief Episode 1020th March 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. 11 Who Killed Sang-bae? Episode 1126th March 2021 Committed to getting to the bottom of the latest murder, the team pulls together — and considers two of their own as prime suspects. 12 Jeong-je and the Deer Episode 1227th March 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. 13 The Next Commissioner General Episode 132nd April 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. 14 Setting the Trap Episode 143rd April 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. 15 Letting Go Episode 159th April 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. 16 Catch Episode 1610th April 2021 In the aftermath of another sudden killing, Dong-sik joins hands with Ju-won to bring down the guilty — and deliver necessary punishment.