In the third year of Daguan, Shen Yuan, the supervisor of the Tea Bureau, had to escort Wuyi rock tea to Bianjing within 25 days, a journey of about 2,500 miles. What he wants to protect is not only the "fire" of the vat of tea, but also the death list that will only appear when the vat is heated - once the internal chain of Cai Jing, Tong Guan and Jin Ren is exposed, there will be knives along the way. Liao spies, Xixia craftsmen, and tea-sacrifice girls who were burdened with tea taxes and Hua Shigang's blood debt were on the same journey with him, each with their own agenda. The Meiyu River, Ganshui River, Huaihe River and Yellow River are in front, and the political enemies are behind. The hard-core journey, technical details and the fate of the dynasty are intertwined: no matter how accurate the calculation is, it still cannot satisfy the people's hearts and destiny.
