Anesthesiologist Lu Yan accidentally met her friend Deng Man, who had been dead for many years, on her way to work a night shift. After that, strange things happened around her one after another.In the process of finding out the truth, Lu Yan's ex-boyfriend who had broken up with her many years ago, detective Jiang Chengyi, was also involved.The truth that had been hidden for eight years was revealed step by step.