Díl 1Police officer Oh Kyeong tae tries to help a small girl by solving the case of her missing mother and suspects the involvement of some upper hands. Corrupted senior inspector Ryu Sooyeol is stalked and threatened by a crazy stranger while trying to help the culprits.
Díl 2
D2
Díl 2Ryu Soo Yeol digs deeper into the case, while Oh Kyeong Tae is wrongly framed for the murder. Amidst the dilemma between justice and success, following some valuable information received from officer Lee Hui Gyeom, Ryu Soo Yeol once again faces the crazy stranger.
Díl 3
D3
Díl 3Su-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.
Díl 4
D4
Díl 4After 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.
Díl 5
D5
Díl 5Su-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.
Díl 6
D6
Díl 6Su-yeol reopens a closed case. He teams up with K to investigate quietly and uncovers the opponent's weakness. Meanwhile, the body count grows.
Díl 7
D7
Díl 7Su-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.
Díl 8
D8
Díl 8Su-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.
Díl 9
D9
Díl 9When 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.
Díl 10
D10
Díl 10As 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.
Díl 11
D11
Díl 11Su-yeol visits Shin Ju-hyeok to seek treatment, but unleashes a very angry K instead. A victim opens up after an attempted suicide.
Díl 12
D12
Díl 12Su-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.
