Amidst the world plunging into darkness by the 'Silent Night', warriors from all corners gathered to establish the 'Northern Heaven Sect'. With overwhelming power from the Northern Heaven Sect, the Silent Night was pushed back, and people began to enjoy peace once more. However, over time, warriors from the mainland began to conspire against the 'Northern Heaven Sect', ultimately causing the death of the fourth-generation Sect Master, Jin Kwan-Ho, and the destruction of the sect.
As people departed from the sect, the only son of Jin Kwan-Ho, Jin Mu-Won, was left behind. Mu-Won never learned anything about martial arts, but eventually, he found the secret martial arts techniques left by his father and began to learn the martial arts of the Northern Heaven Sect. Then one day, a mysterious girl appeared before Mu-Won...!!