Lin Chuan, a modern retired special soldier, accidentally discovered that the explosion-proof door of his ancestral warehouse was a time and space door leading to the world of "Bright Sword" in 1943. He has no system, and his only golden finger is this warehouse that connects him to modern times. He abandoned the idea of directly providing magic weapons, and instead used modern industrial knowledge, engineering technology and medical logistics concepts to carry out an all-round "dimensionality reduction strike" against the agricultural army during World War II. He and the suspicious Li Yunlong, Zhao Gang and others moved from suspicion to trust. They used directional blasting, field first aid, standardized production and other methods to build the independent regiment into an iron army like an infrastructure madman. At the same time, he and the Japanese elite Yamamoto special agent team noticed the abnormality and launched a wise and brave hunt across the era. The ultimate goal is to make up for the regrets of history while creating a new future for the people of that land.
