The ability to perfectly replicate any martial art! Jin Cheonrang, who died a miserable death after being branded as the world’s greatest killer because of this ability. When he regained consciousness, he found he had possessed the body of his son, who had committed suicide three days earlier. Namgungcheon, the son who had been cruelly despised for being the son of the Greatest killer. This time, in the name of my son, I will become the world’s number one swordsman and take my revenge against the world.