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Lin Xia, an ordinary modern woman, gained the ability to travel through different eras after an accident. In order to return to her original world, she accepted systematic tasks and completed counterattack challenges in various eras - from the theater troupe of the Republic of China to the farm of educated youth, from the early days of reform and opening up to the future technological city. Every time, she thought she was fighting alone in a new time and space, but she always met the mysterious man at the critical moment. He seems to know everything, but he hides countless secrets. As the number of times she traveled increased, Lin Xia gradually discovered that these seemingly independent mission worlds were actually closely connected, and the man who always appeared in her life was inseparably linked to her destiny...