Xia Xia is a single mother and a senior researcher at the Institute of Physics.For years, she has been working on particle technology that can travel back in time.One day when Baobao.com's research was about to succeed, Xia Xia discovered that her son had been kidnapped. The other party threatened her son's life and demanded that Xia Xia hand over the particle technology.

In order to save her son's life, Xia Xia took the risk of using unfinished particle technology to return 1 hour and 50 minutes ago. This made things more complicated, and the story behind the kidnapper gradually emerged.