Espionage codename: Shen Gongbao

In the midst of Japan's invasion and the treacherous Wang Jingwei regime's influence in August 1939, Wang Xuesen embarked on a perilous mission, secretly infiltrating the regime's secret service headquarters, "No. 76," while outwardly complying with orders and inwardly defying them. As he navigates the complex web of loyalty and deception, Wang Xuesen's true identity is called into question, and whispers of a mysterious informant, codenamed "Shen Gongbao," begin to circulate. Amidst the treacherous landscape of espionage and counter-espionage, Wang Xuesen's loyalty is put to the test, and a shocking revelation awaits him: the person he trusted most is actually Dai Yunong, who has been hiding in plain sight as the very "Shen Gongbao" he has been working to uncover.