Lin Feng, a top military engineer, woke up behind enemy lines in North China under heavy artillery fire in 1940. Facing the Japanese invaders who were armed to the teeth, he was unarmed and only had the military knowledge in his mind that was beyond the times. From making landmines with local methods to building arsenals in the mountains, from training elite soldiers to commanding battles, Lin Feng used scientific thinking to fight against the iron hoofs of the Japanese invaders. The "Long Yan" special force he created frightened the enemy, and the arsenal he built became the backbone of the base area. This is not a simple counterattack, but an industrial war of resistance forged with wisdom and passion. However, no matter how strong an individual is, he cannot withstand the torrent of history and the cruelty of war. In the darkest moment when his best friend died and his factory was destroyed, he truly understood the true meaning of people's war. This is a road paved with iron and fire. Lin Feng vows to use his own efforts to forge the hardest shield and the sharpest spear for the suffering nation!
