Lin Yue, a modern bridge engineer, encountered a mysterious collapse while inspecting the bridge and woke up as an exiled prisoner of the ancient Liang Dynasty. He was taken to Yanmen Pass, which had been invaded by barbarians for many years, but found that the current prime minister looked exactly like his great-grandfather. With the border at stake, Lin Yue used modern engineering knowledge to reinforce the city walls, design firearms, and defeat the enemy with the weak. However, behind the victory, a conspiracy spanning thousands of years gradually emerged - his time travel was not an accident, but a part of the "Civilization Lockdown" plan. In order to protect the world, he must fight against his own blood and open up a new future before the countdown ends.
