Set in an Eastern fantasy setting, Dan Fei and her brother, guardians of a sword known as the Tian Xíng Jin, are pursued by the evil Xuan Gui Zong clan, who seek to obtain the sword for their master, Mie Tian Hai. While her brother is defeated, Fei, who possesses the sword's crossguard, escapes and finds herself in the care of the wandering swordsman, Shang Bu Huan, and a mysterious man named Lin Xu Ya, who become her protectors from the pursuing Xuan Gui Zong clan.