Season 1

A mysterious, justice-seeking entity throws chaos into the life of a cop who's willing to overlook ethics and corruption for a promotion.

1. 

   1. Episode 1

   2021-12-17 · 75m

   After getting an officer suspended from service, Ryu Su-yeol gets a step closer to a promotion. Oh Gyeong-tae looks for a young girl's missing mom.

2. 

   2. Episode 2

   2021-12-18 · 68m

   Su-yeol retraces Gyeong-tae's steps while tracking down the man in the helmet. Lee Hui-gyeom goes after a necklace that may hold crucial evidence.

3. 

   3. Episode 3

   2021-12-24 · 76m

   Su-yeol falls from Do Yu-gon's good graces. While searching for the necklace at home, Su-yeol finds a collection of objects that are not his.

4. 

   4. Episode 4

   2021-12-25 · 76m

   After ensuring Gyeong-tae's safety, Su-yeol pulls a dirty move. With Kim Gye-sik back on the force, the narcotics unit tracks down a street drug.

5. 

   5. Episode 5

   2021-12-31 · 73m

   Su-yeol searches high and low to prove Hui-gyeom's innocence. But the deeper he dives into the case, the closer he comes to falling into a trap.

6. 

   6. Episode 6

   2022-01-01 · 71m

   Su-yeol reopens a closed case. He teams up with K to investigate quietly and uncovers the opponent's weakness. Meanwhile, the body count grows.

7. 

   7. Episode 7

   2022-01-07 · 71m

   Su-yeol and Hui-gyeom shift focus to the head of the drug cartel. Ms. Yong threatens the police to get the seized assets back in her hands.

8. 

   8. Episode 8

   2022-01-08 · 64m

   Su-yeol learns that K is closely linked to his childhood trauma. A girl shows up at the police station, delirious and covered in someone else's blood.

9. 

   9. Episode 9

   2022-01-14 · 65m

   When bits of his memory return, Su-yeol reexamines the murder of his father. Finding similar cases, he learns one person was involved in all of them.

10. 

    10. Episode 10

    2022-01-21 · 63m

    As the identity of X comes to light, his deranged schemes pick up pace. He comes between Su-yeol and K by revealing K's murderous instincts.

11. 

    11. Episode 11

    2022-01-22 · 62m

    Su-yeol visits Shin Ju-hyeok to seek treatment, but unleashes a very angry K instead. A victim opens up after an attempted suicide.

12. 

    12. Episode 12

    2022-01-28 · 71m

    Su-yeol's hunt for the truth endangers those around him. He has a final face-off with the crazed killer at the place where it all began.