E1 - Episode 1

Aired: March 23, 2019

After an alleged drug trafficker, Yoo Dae-hun, is found dead, Hyun-jin enlists as an officer of the special investigative unit. She has her suspicions about the case and sights Soo-hyun, a killer disguised as a veterinarian, rescuing wild animals.

E2 - Episode 2

Aired: March 24, 2019

Soo-hyun, Hyun-jin and a mysterious high-school girl reside in the same building. Meanwhile, the 'Red Mafia', a Russian mafia is connected to the case Soo-hyun is investigating.

E3 - Episode 3

Aired: March 30, 2019

Karimoff escapes Soo-hyun and Hyun-jin, and seeks a window to strike back. The man-behind is slowly revealed and Soo-hyun's memories begin to return and Karimoff holds Seul-gi hostage.

E4 - Episode 4

Aired: March 31, 2019

Karimoff escapes Soo-hyun and Hyun-jin, and seeks a window to strike back. The man-behind is slowly revealed and Soo-hyun's memories begin to return and Karimoff holds Seul-gi hostage.

E5 - Episode 5

Aired: April 06, 2019

Soo-hyun recalls a memory from childhood and visits an orphanage. Meanwhile, Hyun-jin starts to look into Seul-gi's traumatic past and becomes aware of her identity.

E6 - Episode 6

Aired: April 07, 2019

Hyun-woo recalls Jae-hwan's ambition and closes in on his neck tightly. Soo-hyun finds trouble and faces a divided path.

E7 - Episode 7

Aired: April 13, 2019

Soo-hyun questions the identity of his client, and threatens Phillip to source the information. Hyun-jin is placed on security detail and Soo-hyun assassinates Hyun-jin's client.

E8 - Episode 8

Aired: April 14, 2019

Soo-hyun learns of the terrible actions of Jae-hwan, and is confused. Soo-hyun uses Phillip to draw out his client as his memory slowly returns.

E9 - Episode 9

Aired: April 20, 2019

Soo-hyun chases the hard truth, and is forced to accept it as he learns of his past. Meanwhile, Do Jae-hwan is suspicious of Ji-hye and all plans are put at risk.

E10 - Episode 10

Aired: April 21, 2019

Soo-hyun tracks Ji-hye and crosses paths with Hyun-jin. Hyun-jin is attacked by an unidentified crew. Soo-hyun identifies his client.

E11 - Episode 11

Aired: April 27, 2019

Ji-hye disappears along with the secrets of the serial murder. Hyun-jin frantically searches for Ji-hye. Meanwhile, Hyun-jin learns of the relationship between Soo-hyun and Do Jae-hwan, and takes a step closer to Soo-hyun's identity.

E12 - Episode 12

Aired: April 28, 2019

Soo-hyun's identity is revealed to the police putting him on the run as a killer. Soo-hyun waits for an opportunity to kill his last target, but Hyun-jin begs him to stop.