In the early years of the People's Republic, enemy agents were highly active. Shen Weixi, a former special reconnaissance soldier, is forced to take on a new identity for an almost impossible mission: infiltrate the circle of Gu Yanqing, a department chief in the Bureau of Secrecy, and obtain a list of agents embedded in the highest ranks of her own side. She must pose as a frail widow from a humble background, faithful to the memory of her late husband. Relying on her keen powers of observation and strong nerves, she navigates the enemy's lair, where danger lurks at every turn. Every time she passes along intelligence, she walks on thin ice. As the mission deepens, she discovers that Gu Yanqing is far more than a simple enemy. Beneath his cold exterior, he is also struggling, and a dangerous, delicate bond forms between them as they test each other. Just as Shen Weixi is about to reach the core secret, an even greater trap comes to light: the very “list” she has been searching for may be the ultimate bait, planted to ensnare her side's intelligence network. Caught between personal feelings, trust in her comrades, and her faith in her country, she must make her final choice.
