Tian Meng, a girl from the Department of Modern History, accidentally traveled to the corner of the remaining section of the Great Wall of the Ming Dynasty due to a jade engraved with ancient patterns, and became an orphan in the border town of Jing'an. At that time, the border town was besieged and war was raging. She relied on modern knowledge and historical reserves to struggle to survive in the desperate situation. By chance, she met the border guard general Yan Ji, a stern and taciturn young general who was responsible for guarding the border town. One has wisdom from another world, the other cares about his family and country. The two meet, get to know each other, and stay with each other in the ruins of the city. They use their meager strength to resist foreign enemies and comfort the people. In the ups and downs of troubled times, the deep love that spans time and space shines with immortal light on the corner of the border town.
