Qiao Yan (played by Zhao Liying), who grew up in a border town, has become a well-known actress after years of hard work, but under heavy pressure, she has been cautious along the way. With an anonymous ransomware message, a dusty past became her new shadow. At the same time, the sister (played by Xin Zhilei) who lost contact many years ago suddenly appears, and although the situation seems coincidental, there is a greater crisis hidden behind it. The film is adapted from Zhang Yueran's novel "Big Qiao and Little Qiao".