In the spring of the second year of Jingkang, Bianjing fell. The golden soldiers' iron hoofs trampled through the palace gates, and the centuries-old treasures and classics of the Northern Song Dynasty were about to be burned.
Jitian Ling Shen Tuo, a ninth-level official in charge of royal architectural drawings, accidentally discovered a secret message hidden in the corner of the "Genyue Water Vein Map" when he was ordered to burn the last batch of secret books. It pointed to an inconspicuous Hewu Yamen outside the city, and a puzzling instruction: "Keep the map, guard the pulse, and wait for the Qingming Festival."
At the same time, the mysterious Jin Kingdom woman Wan Yanling arrived on orders, and her target was also the scroll. The two had different purposes and were forced to cooperate, uncovering the astonishing secrets beneath the "Yukouwu" - an ancient mechanical "submersible shuttle" that could travel through underground rivers, and a team of strange craftsmen who collectively set themselves on fire to protect the secrets.
Driving this "submersible shuttle" that carries the fire of civilization, Shen Tuo and Wan Yanling go deep into the dark and boundless underground waterways and embark on a desperate journey to find the "Thirty-Six Reservoirs" that have been erased by history. The musical mechanism in the Mangshan Ancient Tomb, the magnet maze under the Gongyi Emperor's Mausoleum, the fluorescent creatures in the water veins of Jinci... Every secret hides the civilization genes and forbidden technologies that the Northern Song Dynasty tried to preserve.
Behind him, the mysterious "Shaman Detective Department" of the Kingdom of Jin was hot on his heels, vowing to completely destroy everything. There were fatal traps set by the ancients in the past, and they were pursued step by step by foreign masters. Shen Tuo gradually discovered that what he was guarding was not only the blueprints and treasures, but also the last "resurrection" code left for him by a civilization before its collapse.
When the ultimate secret at the end of the vein emerges, they must make a choice: let civilization
