In contemporary society, emotional escorts are on the rise. Xu Yan receives a special high-confidential long-term order to accompany Li Zhe, a rising technological star who only has three months left to live. Li Zhe is cold, ruthless and suspicious, and asks Xu Yan to use her professional skills to help him sort out all the important relationships in his life and find out the sentence he said before his death, "the last lie". When getting in touch with him in depth, Xu Yan discovers that Li Zhe is not cold and ruthless, but has a deep secret hidden in his heart...