“The family head is quite a foolish man.” A servant in the Seol family of Gansu, Ja Woon-yeop, thought this. The foolish family head, manipulated by the new mistress Chu San-mi, contrasts with the upright eldest son, Seol Soo-beom. “The first young master Seol Soo-beom is the most terrifying person I know!” Despite being caught stealing and facing severe scolding and humiliation, Ja Woon-yeop ultimately decides to help Seol Soo-beom thwart Chu San-mi’s schemes. “I am the eldest son of the greatest family of Gansu, I cannot just watch this happen.” “I will grow stronger than now and deal with them all.” Seol Soo-beom resolves to leave and gain strength, seeking revenge against Chu San-mi, and Ja Woon-yeop also decides to leave the Seol family and walk his own path. “In this one life, I refuse to be just an orphan or a servant; I will rise as a superhuman.” “Freely and with pride, I will roam this vast world.” Ja Woon-yeop, who became a master through training his own martial arts from a mysterious secret manual, begins to get closer to the scheme that loomed over the Seol family of Gansu as he meets various comrades… Then one day, Ja Woon-yeop and Seol Soo-beom meet again. Ja Woon-yeop is surprised by Seol Soo-beom’s martial arts. “To think you, the eldest son of an orthodox family, would use such a sword technique!” The very man who condemned him as wicked was now treading a heretic’s path, just like himself!