In the 22nd year of the Republic of China, Qingshan Town, Jiangnan. Shen Jiayan, a doctor who returned from studying abroad, returned to his hometown due to a mysterious letter from home, only to find that the library at home had mysteriously caught fire and his father's whereabouts were unknown. In the process of tracing the truth, he reunited with his childhood sweetheart Su Wanqing. Su Wanqing is the heir to Su Ji Pharmacy in the town. He is gentle and intelligent but carries family secrets. The two worked together to explore, not only uncovering the secrets of anti-Japanese and national salvation information hidden in the Shen family library, but also involving decades of grudges and entanglements between several big families in Qingshan Town. In the intertwining of the righteousness of the family and the love of their children, they went from the ignorant old dream to the war years of fighting side by side, guarding the land with their youth and blood, and also guarding each other's deep love.
