红色女谍沈安娜在中国人民的解放事业中，一大批优秀的共产党员和革命志士冒着生命危险，深人虎穴，在党的领导下，机智、敏锐地探察敌情，及时准确地将敌人的阴谋活动报告给党组织．使党在关键时刻能作出正确的决策。他们身在敌营，长期为党工作却鲜为人知，甘当无名英雄... In the cause of liberation of the Chinese people, a large number of outstanding Communist Party members and revolutionary intellectuals risked their lives in a deep-rooted manner. Under the leadership of the party, they witnessed the enemy in a witty and sensitive manner, timely and accurately classified the enemy’s Conspiracy report to the party organization. So that the party can make the right decisions at the crucial moment. They are in a hostile camp, but for a long time they have little known about the work of the party and are willing to be unnamed heroes.