Under the bustling surface of modern cities, there are countless strange phenomena that have been ignored. Lu Li joins the city's anomaly response bureau and investigates various bizarre incidents with Su Qing, Zhou Yi and other teammates: suddenly disappeared populations, cursed ancient buildings, horrific information spread on the Internet... As the investigation deepens, they gradually discover that these incidents are not isolated, but are inextricably linked to a mysterious organization called "Shadow". "Shadow" seems to be using weird urban events to create chaos and try to awaken some dormant power. In order to protect the safety of the city and uncover the truth, Lu Li and his team launched a thrilling contest with the "Shadow". In the process, Lu Li gradually discovered that the events he encountered in his childhood were closely related to the "shadow", and he also began to re-examine his identity and mission. In the end, with the help of Professor Chen, Lu Li and his team successfully defeated the "Shadow", stopped their conspiracy, and maintained the peace of the city.