Qiao Yan, who grew up in a border town, became a well-known actor after working hard for many years, and under heavy pressure, she was careful along the way. With an anonymous blackmail message, a dusty past becomes her new shadow. At the same time, the sister who lost contact many years ago suddenly appeared, and the matter seemed to be a coincidence, but there was a bigger crisis behind it.
The film is adapted from Zhang Yueran's novel "Big Joe Little Joe".
1949年,国民党反动派悍然包围了中共驻重庆办事处,我办事处被迫撤回延安徐鹏飞派遣爪牙,打入重庆大学和沙坪坝书店,追查《挺进报》的线索,企图破获重庆地下党组织许云峰察觉敌人阴谋,及时采取措施却被叛徒出卖,江姐等地下党员为此入狱。