1x1 - Han Ji Hyuk Returns

September 17, 2021

Agent Han Ji Hyuk gets discovered on a fishing boat. The National Intelligence Service gets notified of his identity number, but his file is locked. When they realize he's their ace agent who went missing one year ago, they rush to get him. However, Ji Hyuk doesn't remember anything that happened, leaving many questions unanswered.

1x2 - The Huayang Gang

September 18, 2021

After watching a video of himself disclosing his mission, Han Ji Hyuk seeks to find the rat in the agency and the last piece of the puzzle. As he narrows down his suspects, Jang Gwang Cheol, the second-in-command of the Huayang Gang, gets taken into custody. With his arrest, the police get a threatening call for his release or suffer the consequences.

1x3 - Do You Need to Take It This Far?

September 24, 2021

Han Ji Hyuk's memory flashes before him. He remembers that it was Choon Gil who came to the safehouse in Dandong to see him. Without the agency's support, he tracks him down to find out everything that happened on that day one year ago.

1x4 - I'm Chasing the Same Guy

September 25, 2021

Ji Hyuk tries to find out who at the agency received the last emergency call from Dandong. To find out, he attempts to retrieve intel from the main server of the NIS. However, the server gets hacked by an unknown hacker, and the intel falls from his grasps. He chases down the hacker to regain fragments of his memory.

1x5 - A Ticking Time Bomb

October 1, 2021

New truths unfold as Ji Hyuk investigates Seo Su Yeon. While he digs into Su Yeon, he gets faced with a new enemy when his partner Je Yi gets kidnapped. Meanwhile, a North Korean defector's testimony raises questions of its validity surrounding an ongoing espionage case.

1x6 - Fire At Will

October 2, 2021

Ji Hyuk becomes a suspect and gets chased down by the NIS. He can't trust anyone and only has one choice. To find Su Yeon's shooter and find evidence to prove his innocence. Meanwhile, Director Kang Pil Ho takes over the case and tries to bring in Ji Hyuk.

1x7 - Sangmuhoe

October 8, 2021

Ji Hyuk and Je Yi find out that an organization called Sangmuhoe was behind Su Yeon's shooting. While in pursuit of the organization, they get faced unexpectedly with yet another unknown identity. Meanwhile, Chief Ha helps Ji Hyuk fill in the gaps of his fragmented memory.

1x8 - It All Starts Now

October 9, 2021

Ji Hyuk now knows the person who has been leaving him a trail of clues about his lost memory. Amidst the collapse of the Foreign Intelligence Bureau, Ji Hyuk and Ye Ji get one step closer to finding out the purpose behind Sangmuhoe's objective. Meanwhile, Ji Hyuk vows to keep his promise with Su Yeon.

1x9 - Are We Colleagues?

October 15, 2021

With a clue left by himself in a video he made one year ago, Ji Hyuk rushes to find the traitor within the agency. However, Je Yi turns her back on Ji Hyuk as she feels betrayed by him. Meanwhile, Ji Hyuk rushes to the scene where Baek Mo Sa and Deputy Commissioner Do are meeting.

1x10 - Ji Hyuk’s Memory Returns

October 16, 2021

Ji Hyuk's memory of what happened one year ago returns to him. The truth is hard to accept. But now that he knows more about the cover-up, the motive of his revenge becomes clearer. Meanwhile, Ji Hyuk gets arrested, but Director Kang makes a deal to get him out.

1x11 - Is He My Dad or Baek Mo Sa?

October 22, 2021

Baek Mo Sa begins to stand in front of his operations to make his objective come to life. Han Ji Hyuk and his colleagues gear up to stop Baek Mo Sa's plans. However, they face his wrath as they enter his hideout.

1x12 - Ji Hyuk and Je Yi Race Against Time

October 23, 2021

Ji Hyuk and Je Yi become isolated from help. It's up to just the two of them to stop Baek Mo Sa's terrorist act and save the lives of innocent hostages trapped inside a building. With the hope that a little bit of Yoo Joon Man still exists inside him, Ji Hyuk and Je Yi go after Baek Mo Sa.

1x13 - Episode 13

1x14 - Episode 14

1x15 - Episode 15

1x16 - Episode 16

1x17 - Episode 17

1x18 - Episode 18

1x19 - Episode 19

Namkoong Min

Han Ji-hyuk

Park Ha-seon

Seo Soo-yeon

Kim Ji-eun

Yoo Je-yi

Kim Byeong-gi

Bang Yeong-chan

Lee Kyung-young

Lee In-hwan

Jang Young-nam

Do Jin-sook

Yu Oh-seong

Baek Mo-sa

Kim Jong-tae

Kang Pil-ho

Kim Min-sang

Jung Yong-tae

Kim Do-hyun

Ha Dong-kyun

Kwon So-hyun

Koo Hyo-Eun

Jung Moon-sung

Jang Cheon-woo

Hwang Hee

Oh Kyung-seok

Jo Bok-rae

Kim Dong-Wook

Park Jin-woo

Cha Min-Cheol

Hyun Bong-sik

Cheon Myung-ki

Jung Ji-yoon

Kim Yeo-jin

Ok Ja-yeon

Lin Wei

Ahn Seong-bong

Kim Young-Woo

Im Cheol-hyung

Kim Dong-Hwan

Choi Hee-jin

Staff

Jung Young-hoon

Do Jin-Sook's subordinate