Ailiseu - Season 2 (2013)

Because of the NSS' failure in Hungary, Yoo-Gun has been suspended for one month. Hyun-Woo is sent to Cambodia to capture Joong-Won.

Yoo-Gun plans to use Baek San as bait to figure out what IRIS wants with him and who the IRIS mole is in the NSS base. Soo-Yeon tries to recover from the effects of killing for the first time.

Yoo-Gun has been captured by IRIS. Soo-Yeon refuses to believe he's dead.

Yoo-Gun is living in Japan with amnesia. IRIS has manipulated him into working for them, as an assassin. Meanwhile, the NSS follows Park Cheol-Young to Japan, believing him to be a member of IRIS.

After killing Park Cheol-Yeong, Joong-Won returns to the North as a hero. The NSS prepares for an attack, from Yoo-Gun and IRIS, at the North and South reunification meeting.

The North and IRIS have staged a kidnapping of a Northern Representative and are blaming it on the South. Now, the NSS has 24 hours to find the terrorists or it'll be war.

The NSS negotiates with the North in order to hunt down IRIS, together. Yoo-Gun's memory starts to come back.

IRIS plans to exchange Yoo-Gun for Baek-San. But, the NSS believes that Yoo-Gun is now a member of IRIS. Soo-Yeon finds out that Baek San is really Yoo-Gun's father.

Yoo-Gun is relieved from the NSS and is put under house arrest. Baek San has disappeared. Joong-Won plans to return to the North.

Choi-Min decides to work with Yoo-Gun, secretly. Ray and Soo-Jin negotiate with the NSS, offering to hand over Mr. Black for their freedom. Yoo-Gun finally finds out that Baek-San is his father.

Yoo-Gun pursues Joong-Won for killing his mother. Soo-Yeon mopes over her brother's death. Beak-San reveals the location of the nuclear bombs to Choi-Min.

Hyeon-Kyu has discovered that the bullet piece, inside Yoo-Gun's head, may turn him into a psychotic killer. Yoo-Gun captures Yeon-Hwa. There is a new spy in the NSS.

The NSS interrogates Hyun-Woo and Shi-Hyuk to see which one is the spy. Cheol-Hwan returns to the NSS. Joong-Won captures Soo-Yeon and plans to use her as bait for Yoo-Gun and Baek-San.

With Soo-Yeon and Baek-San lost, Joong-Won turns to plan B. Yeon-Hwa joins up with Joong-Won as a spy for Yoo-Gun. Shi-Hyuk escapes NSS custody.

Mr. Black sets up a meeting with Joong-Won. Yoo-Gun gives Baek-San's hard drive to his allies at the NSS. Choi-Min is relieved of her position at the NSS for trying to transport the nuclear bombs to the U.S without authorization.

Joong-Won and his team have steal one of the nukes from the NSS' custody. Baek-San makes a deal with Mr. Black to trade his last nuke for Joong-Won.

Yoo-Gun and the NSS try to track down Joong-Won and the nuclear bomb.