A butterfly in South America flaps its wings, and various factors may cause a typhoon in Asia. An extremely small and seemingly inadvertent thing can have huge consequences. This is not Inception, this is reality. In 1983, a virus outbreak at a deep-sea vaccine testing base swept the entire Atlantic Ocean. Every decision you make will affect each other's life. The beginning of the story cannot be changed, but the ending is not unique. "Ning Qingchuan, why are you doing this? You must know that you and I are not real if you take off your glasses."