Lin Xiao, an urban youth in 2023, traveled to Forty-Nine City in 1958 after a car accident and became the eldest brother who had been missing for ten years in No. 95 Nanluogu Lane. He turned out to be a veteran of the war and formed a lifelong friendship with the battalion commander who had a profound background. With a daily refreshed flash kill system and storage space, Lin Xiao not only has to adapt to an era of scarcity of supplies, but also has to face the appearances of all living beings in the "Qinman Siheyuan" in his memory. As the eldest son who suddenly returns, he must reorganize a broken family, protect his younger brothers and sisters who have not been blunted by life, and at the same time use the advantages of modern thinking and systems to find his own path in a special era.
