In the thirty-seventh year of the Republic of China, the city of Nanjing was in turmoil. Lin Wanqing, a translator for the Ministry of National Defense, has a dual identity. She sneaked into an underground organization under the codename "Shengmi" and practiced "Contemplation of the Five Realms" under the guidance of teahouse owner Qin Wen, delivering information and protecting cultural heritage on the tip of a knife. The Bureau of Secrecy implemented the "Context Project" with the intention of burning ancient books and tampering with history. Lin Wanqing, together with Chen Huaian, Jiu Ye of the Boat Gang and other partners lurking in the Ministry of National Defense, used strategies such as "hiding the truth" and "resurrecting the soul through corpses". From the secret collection of books in the Purple Mountain air-raid shelter to the life-and-death crossing of the Yangtze River, they guarded the fire of Chinese culture with their flesh and blood, and completed the transformation of "raw rice to cooked rice" in troubled times. With espionage as the backbone and cultural inheritance as the soul, the story depicts a group of nameless people who stick to their true intentions in the darkness. It interprets the profound connotation of "Crossing the river with cultural context is actually crossing the river with people's hearts" and pays tribute to those guardians who use their lives as fuel and light the way forward for civilization.
