Zhang Tiedan, a young farm boy in troubled times, enlisted in the army and became a low-level trench soldier. When he was about to die, he awakened a universal engineer shovel, which could build trenches, bunkers, artillery and even mobile fortresses out of thin air. With a shovel, he made a comeback from a desperate situation, built an invincible defense line, established unparalleled military exploits, and counterattacked all the way to become a pillar of the country's defense. Together with the iron-blooded female general, he rewrote the fate of the country in troubled times.
