The Yong Dynasty experienced unprecedented changes in a century. Witchcraft withered, sorcerers went into exile, and only cold iron cleverness emerged in the world, with steam roaring and iron armor like a forest. Xuan Li, the orphan of a family of forbidden arts in the past, carries the remains of his bloodline and ancient magic on his shoulders, wandering where blades and gears intersect. He is not only the last inheritor of the old skills of the subjugated country, but also the unknown forger of new era technology. Some people use the art of mechanism to build a capital and a country, and some use spells to control the wind and move the clouds, but Xuan Li wants to find a way to meet the two. A powerful enemy is present, and the city of Tiangong wants to destroy the remaining witches. There is an undercurrent in the court, and old friends and new enemies arise. Xuan Li had a question in his mind: Which one is the master of the human heart, demons or weapons? In the torrent of destiny, he will use his own body as a guide to awaken the fire of the stars that has been sleeping for thousands of years. He is neither bound by the old gods nor driven by new weapons, and vows to embark on a legendary song of his own.
