The play tells the story of 1948 Qingcheng a U. S. Army major who was assassinated, triggering a contains the story of affection, love, friendship, and that human nature is good or evil contest in a series. At the beginning of 1948, occurred in the assassination of U.S. Qingcheng special case, FBI officials Yu Beiping was sent to investigate the case of qingcheng. He knows that the special transfer Bureau appointed to investigate the case of the deep purpose, to identify their own identity. The crisis of Yu Beiping saw a long lost daughter in qingcheng. Daughter identity mysterious, is investigating their own. University of Yu Beiping and his current wife, the daughter of Xu Danni in Qingcheng, leftist ideology, to father spy identity sniffy, was in love with a married Professor, let Yu Beiping very distressed. Yu Beiping on the one hand to complete the task of organizing the highest, on the one hand carefully protect their own two daughters. Eventually, the eldest daughter to protect him and sacrifice, his daughter until Father separation we suddenly realize: father is a true communist. But since then two people are always separated from the end of the world.