The background of the story is set in the late 1930s of the Blue Star Calendar, in the occupied "Nanjiang City" of the East Asian Federation. The invaders' iron hooves trampled on this land, their homes were shattered, and the people were in dire straits, but the fire of resistance never went out.
Qin Zhaohe, on the surface, is a capable manager of a foreign-funded firm in the city, but in fact, he shoulders the important responsibility of the leader of the secret anti-Japanese organization "Xiange Club". He was far-sighted and strategizing, and under the strict supervision of the occupying forces, he planned thrilling secret operations one after another.
Wu Jiayin, a top medical student who comes from a scholarly family and is full of enthusiasm to serve the country. She is extremely intelligent, kind and upright, but she decided to join the war because she witnessed the destruction of her home and the suffering of her compatriots. In an accidental encounter, she was attracted by Qin Zhaohe's firm belief and charisma, and gradually became an indispensable secret agent of the "Xiange Society". She used her unique memory and medical status to deliver intelligence and rescue the wounded in enemy-occupied areas.
The two fought side by side in troubled times. From the initial resonance of their ideals to their dependence on life and death, they jointly faced the pursuit of occupying agents, the threat of internal traitors, and difficult choices. Not only do they have to deal with powerful enemies, but they also have to temper and grow in the test of human nature and faith. This novel will show how a group of unknown heroes use their wisdom and courage to write songs in troubled times with their lives when the nation is in danger, fighting for light and freedom.