In a murder case twenty years ago, the suspect identified the wrong person, but Chen Yan showed an erased surveillance video - the murderer in the picture was not the face he thought he had at all. Now, the new captain Lu Xiao is tracking down a series of robberies, and the clues overlap with the old cases. Chen Yan retired for many years, but was involved in the storm; forensic doctor Zhou Muchu hid the secret autopsy files, videographer Lao Huai guarded the tapes, and prison guard Tang Qi delivered fragments of the truth. When the shadow in the surveillance camera started to move, the entire police world became a hunting ground.
