In her twenties, Xu Yan followed a strict schedule but her body aged prematurely, resembling a sixty-year-old’s. Before her sudden death, she suspected her intern, Fan Xiaoran.
Reborn, Xu Yan discovers Fan Xiaoran had been transferring the side effects of her own sleep deprivation to her. Unable to escape, she seeks clues about Fan’s previous victim to uncover the full truth.
Armed with evidence, she returns to the company, exposes Fan, and makes her and the indifferent bystanders pay. After her promotion, Xu Yan publicly opposes the toxic work culture of overworking.
