The genius policewoman Shi Yan is forced back to the scene of an old case, where her astonishing ability to retrace events uncovers the bloody truth behind a series of disappearances from seven years ago. Forensic pathologist Shen Zhao discovers something abnormal about her ability. Online blogger Jiang Heng closes in on the heart of the case with her sister's belongings, while the fragmented memories of retired cleaner Zhou Zhi conceal surveillance footage deliberately erased by those at the top. As Shi Yan's younger sister secretly interferes with her memories and a recording from her former superior quietly leaks, the truth becomes more than a case to solve. It becomes a soul's judgment over redemption, betrayal, and who deserves to survive.
