The story takes place in the modern city of Norville and tells the story of detective Ethan Cole and forensic examiner Amelia Green who work together to solve a series of bizarre cases. Each case seems to be independent, but as the investigation deepens, they gradually discover that there are inextricably linked between these cases, pointing to a serial killer Samuel Knox hiding in the dark. In the process of hunting Knox, they not only have to face cunning criminals, but also deal with the obstruction from lawyer Victor Lane and the tracking reports of reporter Lucy White. As the truth gradually emerged, Ethan and Amelia discovered that they were not only facing criminals, but also the darkness of human nature and the dark side of society. They must search for the truth in the fog, finally bring the criminals to justice, and complete their own redemption.
