Lu Tianyuan, a top student in science and engineering, transmigrates into the body of a refugee on the borders of Great Yan and unexpectedly binds himself to a technology advancement System. He appears to be a simple, honest farmer, but secretly improves military weapons and stockpiles provisions. He recruits a hunter, a strategist from a poor family, and a poison doctor from the jianghu as his trusted allies, and becomes the bickering partner of Xiao Qingyue, a proud daughter of a military family.
The twelve cities of the northern frontier are rife with hidden dangers: a ruthless spy chief has woven a twenty-year web of intrigue,
a hardline prince conspires with foreign enemies, a power-hungry minister controls the court, and a tyrannical prince runs
amok. Lu Tianyuan uses technology to break through crises and strategy to overcome obstacles. From refugee camps to strongholds, from frontier battlefields to the imperial court, he leads the “Four Heroes of the Northern Frontier” in unraveling the mysteries that have haunted three dynasties. With a torrent of steel and the fire of his intellect, he carves a path of reform through a world in ruin.
