In the autumn of the twelfth year of Emperor Taizong’s Zhenguan reign, corresponding to the month of Xuanxiao in the ancient Zhuanxu calendar, the story unfolds deep in the Taihang Mountains, among the Wuxian tribe. Here, stone altars from the Neolithic Age still stand. The shamans read Heaven’s will in the cracks of tortoise shells, and the greatest among them can commune with the celestial officials of all twenty-eight lunar mansions. The tribe records its history using both knotted cords and oracle-bone script, and preserves a medical compendium dating back to the age when Shennong tasted the hundred herbs. The protagonist, Wu Yang, was born an ordinary member of the tribe, but was granted divine power. To save the people of his homeland, he sets out on an extraordinary adventure…