When she was three years old, Gu Nanyin was taken away from the wealthy Gu family and has not been heard from since. Eighteen years later, she took the initiative to knock on the Gu family's door. Facing this sudden return of the real daughter, her biological parents looked away, and her brother was full of disgust. The "sister" Gu Yurou, who was only one month younger than her, handed her a cup of tea with red eyes: "Sister, you must have suffered a lot in these years, right? My home will be your home from now on." Everyone thought that this girl who grew up in the countryside would be at a loss for life in a wealthy family, would make jokes at banquets, and would become the best foil for Gu Yurou's elegance and generosity. But they didn't know that Gu Nanyin came back not to recognize his relatives, but to "borrow his identity". In the past eighteen years, she has been the number one target for elimination by the international supernatural organization "Order". She is a "bug" who keeps escaping from death in time backwards. She possesses the rarest ability in the world - at the moment of death, she can go back in time for thirty seconds. And this secret happens to be the "key" that the mysterious villain organization wants most. When Gu Yurou secretly colluded with the supernatural organization and tried to exchange the life of the "real daughter" for the chance of awakening, Gu Nanyin looked at herself lying on the ground in the surveillance camera, sighed softly, and pressed the timer on her wrist. Time begins to flow backwards.
