Six modern special forces traveled to the anti-Japanese battlefield in 1938 and took root in Blackstone Mountain with their iron-blooded faith. They hid the identity of the travelers, used modern knowledge to make guns and cannons, transformed the mines into arsenals, and used local cement to build fortresses. From intercepting grain supplies to shelling strongholds, from cooperating with guerrillas to ambushing the Japanese, they used steel to reshape the war situation and awaken the military and civilians with their belief in equality. When the homemade guns sounded, and when the red flag of the "Independence Regiment" was planted on the city, this group of time travelers proved with their blood that even without modern equipment, they could use their wisdom and iron blood to fight their way out of the beacon fire, making the Japanese afraid of them.
