In the parallel Song Dynasty set by Wu Zunmo of Han Dynasty, engineer Zhao Yuan wakes up in the Salesian Bureau. The Liao army drove mutant beast soldiers to suppress the situation, and the court issued secret orders to hide murderous intentions. With his mechanical knowledge that surpassed the times, he created the "Vortex Crossbow" that reversed the situation in the Xiongzhou offensive and defensive battle, and was even forced to get involved in the bloody purge of the "Mo Thorn" organization within the Mohist family. When the "Glutious Seed" of Shuofang Witch Festival quietly awakened, he could only use the torrent of steel to break through the mystery of animal blood shrouding the northern border...
