The Legend of the Northern Blade synopsis:
When the world fell into darkness, a group of martial artists united to establish the "Northern Heavenly Sect." With the support of this sect, peace was gradually restored to the land. However, as time elapsed, some martial artists within the sect conspired against it, ultimately leading to the tragic demise of the Sect Leader, Jin Kwan-Ho, and the sect's downfall. As the sect's members scattered, the only remaining figure was Jin Kwan-Ho's son, Jin Mu-Won. Although Mu-Won had never received formal martial arts training, he discovered the secret techniques left behind by his father and embarked on a journey to master the martial arts of the Northern Heavenly Sect.