According to legend, King Wu Jifa was afraid that the human race would be harmed by demons and rebellious immortals. He used the Yi hexagram left by King Wen to seal the heaven and earth so that demons, immortals, Buddhas, demons, ghosts, monsters and other races that exceeded the limits of human race could not exist in the world for a long time. According to legend, those who get the sixty-four hexagrams can achieve the right path and gain great magic power, command the world, and live as long as the sky. But the sixty-four hexagrams seal not only the heaven and the earth, but also the black dragon sealed by Dayu's flood control. Now, the souls of the sixty-four hexagrams have reappeared in the world, demons are rampant, the sixty-four hexagrams have collapsed, and the souls of the sixty-four hexagrams have returned to their respective places. The protagonist Xiao Yao acquires Dunjia from the legendary sect of Mr. Chong'en, the 27th generation head of Mr. Junping's Qi Sect. One day, Emperor Wang Du Yu entrusts him with a dream to gather the souls of the sixty-four hexagrams to re-seal the black dragon. From then on, Xiao Yao and his junior brother Tang Yu's journey to find hexagrams begins.