Jun is a top agent of the National Intelligence Service who can strike down dozens of terrorists in one fell swoop. Disenchanted with his life, Jun disguises his death and succeeds in leaving the NIS to lead a normal life as a family man and fulfill his dream of becoming a webtoon artist. However, his unexciting webtoons are ignored by readers and even his wife. Depressed and angry at himself, Jun suddenly draws a webtoon of his past as a secret agent.

Hell-bent on avenging the murder of his family, a former detective infiltrates a remote island that serves as a prison for vicious death row criminals.

Kingdom of Goguryeo, ancient Korea, 645. The ruthless Emperor Taizong of Tang invades the country and leads his armies towards the capital, achieving one victory after another, but on his way is the stronghold of Ansi, protected by General Yang Man-chu, who will do everything possible to stop the invasion, even if his troops are outnumbered by thousands of enemies.

Set in 1398. Kim Min-Jae (Shin Ha-Kyun) is the supreme commander of the Joseon Dynasty. He falls in love for the first time and for that woman he takes risks. Yi Bang-Won (Jang Hyuk) is the King’s son. He helped his father setup the Joseon Dynasty era, but he was not picked as the Crown Prince. He still holds ambitions of becoming the King one day. Jin (Kang Ha-Neul) is Kim Min-Jae’s son and the King’s son-in-law. Due to his position as the King's son-in-law, he is unable to take part in politics and only seeks out pleasure.