A retired hitman whose wife goes on a trip with her friend, and asks him to look after the friend's teenage daughter. Things go awry when he is forced to use a little violence to protect the girl from juvenile delinquents, but then they are found dead and the girl is kidnapped.

Tae-yeul, a swordsman in his thirties goes out to find his only daughter after losing one of his eyes. Min Seung-ho, the Joseon dynasty's best swordsman chooses an ordinary simple life after perceiving the transient nature of power. Gurutai, the best swordsman in Qing dynasty aspires to become the best even in the Joseon dynasty.