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Xia Tian (Yang Mi) is a single mother who works as an associate researcher, helping to complete a technology that can allow people to go back in time. One day, her son Dou Dou is kidnapped by a mysterious man (Wallace Huo) and she was forced to hand over her life's work. She takes a risk and travels to a time an hour and fifty minutes earlier in hopes of saving her son. Read more on Wikipedia.