Lu Zheng, a modern special operations team member, accidentally crossed over during a mission and became a refugee auxiliary on the border of Qin at the end of the Warring States Period. Living in troubled times, he relied on his ten years of special warfare experience, the "wartime tactical memory bank" unlocked in his mind, and his original intention of "surviving, protecting those around him, and taking control of his own life". He started as an auxiliary soldier at the bottom and gradually rose to prominence.
He first rectified the lax soldiers in the auxiliary camp, defeated the Huns scouts with actual combat training and clever tricks, and was recognized by General Meng Ao, who was promoted to a senior position. Later, he skillfully used terrain and tactics in the battle with the Huns' main force, and was promoted to the rank of captain; in the face of Li Gan's difficulties and Lu Buwei's plot, he stood firm and stood firm. He responded calmly and calmly, and proved his innocence with military exploits; in the battles to unify the six kingdoms such as attacking Han, conquering Wei, conquering Chu, and destroying Zhao, he improved the defensive equipment, skillfully used explosives and ambush tactics, killed Xiang Yan, and defeated Zhao Kuo.
In the process, he got to know the loyal and brave Chen Hu and Liu San, met the gentle and tough medical girl Su Yunxi, and formed the bond of "enemy and friend" with Zhao Kuo. After going through the baptism of blood and fire, and the game of intrigue, he finally helped King Yingzheng of Qin to sweep the six countries and unify the world. After becoming successful and famous, he refused the temptation of power and position, chose to disband and return to his fields, and stayed with Su Yunxi in the peaceful and prosperous age, successfully realizing his original intention at the time of time travel.