Xuansheng, a wanderer traveling across the four seas, met the young swordsman Gu Qiu. The two got to know each other through subduing demons and embarked on a journey together. After going through numerous hardships, they forged an indelible bond, redeemed and supported each other, slayed all the demons in the world, and experienced the warmth and coldness of human nature, searching for the true meaning of life and the warmth existing in the world amidst one environment after another.