Daniel Lee (played by Liu Guoxiong), a handsome, rich and American Chinese, has a nightmare with a woman in red. Inexplicable digital marks appear on his arm. The numbers start from 49 and decrease day by day. The nightmare is like a burning countdown. People around him die one after another. He becomes a major suspect. Scientific investigation cannot explain all the doubts, but he finds the answer in the folk custom of "watching the fallen ghosts". Why does 29-year-old Liu Yizhen (played by Ren Rongxuan) who doesn't like to dress up aspire to become a criminal police? How can she help herself out of the mud when she is trapped in painful memories? How can she help Li Jiahao find the final truth step by step? A scarred puzzle, unraveled one by one, who can get away with it? Who is the real mastermind behind it?