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.
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.
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 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.
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.
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.
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.
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.
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