In 2024, Lin Feng, a graduate student in the Department of History, accidentally came into contact with a bronze dagger engraved with an eagle pattern while researching the "Espionage Archives of the Republic of China". He was involved in the turbulence of time and space by a mysterious current, and traveled to the occupied areas of North China in 1943. He became the unidentified Yan Shuangying who had just "resurrected from the dead" in an ambush battle. At this time, Yan Shuangying has not yet become a legend. He is just an ordinary agent in the anti-Japanese base area who is burdened with guilt for his mistake that led to the sacrifice of his comrades. After Lin Feng's soul settled in, he not only inherited Yan Shuangying's skills, but also brought modern knowledge and the memory of the "Yan Shuangying Legend", and was forced to walk a completely different path in troubled times.
