After his entire unit is betrayed by their country, Jin-pyo decides to raise his late friend's son up, as a warrior, in order to get revenge on the five politicians that were in charge of his unit's mission.

Yun-seong goes under cover, as a doctor for the Blue House, in order to get close to his first target, Senator Lee Kyung-wan. Kim Na-na gets a job as a bodyguard to the president's daughter.

Jin-pyo decides to take his revenge into his own hands. Now he and Yun-seong are in a race to catch the rest of the politicians.

Yun-seong and Na-na move in together so that he can protect her. Yun-seong and Sik-Joong try to gather enough evidence to take Yong-hak down.

Yun-seong tries to cut himself out of Na-na's life, once again. Jae-min is growing desprate to keep his employees under control.

Yun-seong tries to gather enough evidence to expose Kyung-wan's true colors.

The next target is the Minister of Defense, Seo Yong-hak, who is in favor to win the presidential election. In the meantime, Yun-seong tries to mend his relationship with Na-na.

Yun-seong and Shin-joong plan to expose that Yong-hak's sons' illnesses are fake, so that they'll join the army. Yun-seong finally agrees to tutor Da-hye.

Young-joo believes that Yun-seong is the City Hunter, but he can't prove it. Na-na tries to deal with the knowledge of knowing Yun-seong is the City Hunter and her feelings for him. Kyung-hee finds out that she has leukemia.

Yun-seong quits his job at the Blue House in order to cut himself out of Na-na's life. Jin-pyo plans to use Yun-seong's mother as a hostage in order to keep Yun-seong under control.

Na-na offers to help Yun-seong take down the rest of the politicians. Young-joo tries to persuade his father to come clean with the money that he's stealing from the college.

There have been complaints from employees working at Haewon Group's company about working with toxins. Kyung-hee receives Yun-seong's bone morrow. Young-joo investigates Yun-seong's background.

Yun-seong tries to make sure Na-na isn't around for when he tries to take down Yong-hak again.

Yun-seong and Jin-pyo's next target is Kim Jong-sik, the former Minister of Education and Young-joo's father. Yun-seong tries to cut himself out of Na-na's life in order to protect her.

Young-joo has been taken off the City Hunter case, be he rufes to give up. Shik-joong searches for Yun-seong's mother. Yun-seong and Na-na try to gather the proof that will take Jong-sik down.

Jae-min is on to Jin-pyo. Na-na has been assigned to protect the president. Yun-seong tries his best to get over Na-na. Young-joo is back on the City Hunter case.

Yun-seong tries to carry out Jin-pyo's plan. Jae-min starts making desperate moves to save Haewon from going into bankruptcy. Young-joo tries to catch Jae-min before the City Hunter does.

Young-joo now knows that Yun-seong is the City Hunter. Jae-min escapes. Yun-seong learns a long kept secret about his father.

Tensions grow higher between Yun-seong and Jin-pyo. Kyung-hee finally finds out that Yun-seong is her long lost son. The next target is Haewon Group president Chun Jae-man.

Yun-seong and Jin-pyo's fifth and final target is Choi Eung-chan, the South Korean President.