Once Lu Yuan traveled through time, he became cannon fodder in the border death camp. Everyone here is waiting to die, but he uses modern tactics to defeat the enemy's tricks. Military doctor Su Jinshu secretly helped, and veteran Zhao Tiezhu sent a message on his orders, which actually revealed the truth about military supervisor Han Lie's collaboration with the enemy. After enduring humiliation for three years, Lu Yuan set up an ambush to counterattack in a desperate situation, and tens of thousands of enemy troops were defeated. The enemy commander Murong Ke was forced to surrender the city, but Lu Yuan sensed a deeper conspiracy-that city was a bigger trap.