It tells the story of Shanghai in 1941. Fang Jiashu, a Communist Party member who was lurking in No. 76 of the Wang Puppet Agent Headquarters, was in danger of being exposed. At this time, his childhood child bride Tao Yuling, who was also an underground worker of our Party, broke into his house with her two children.Life, and in order to protect Fang Jiashu's hidden identity, he started a hidden story pretending to be a family.