Kim Je Ha is a former mercenary soldier known as “K2” who suddenly turns into a fugitive when he is wrongfully accused of killing his girlfriend. He uses his new job to revenge on Park Kwan Soo, the leader of the current ruling party and Se Joon’s rival, whom Je Ha believes ordered the murder of his girlfriend. However, when Je Ha is assigned to guard Go An Na, the illegitimate daughter of Se Joon, they begin to fall in love with each other…...