The Super Sleuth Squad

In a city shrouded in gloom, a series of bizarre and terrifying cases shatters the peace. Young detective Xiao Ming, veteran detective Lao Zhang, brave reporter Xiao Mei, quick-witted police officer Xiao Lin, and experienced criminal investigation captain Lao Wang come together in their steadfast pursuit of justice.

The strange deaths in the remote town under Xiao Ming's watch leave every victim with a mysterious smile and a mysterious letter. The missing persons case taken on by Lao Zhang leads to an abandoned factory shrouded in fog, which every missing person had visited. The “Cursed House” investigated by Xiao Mei is filled with eerie phenomena. At the scene of an artist's death, the jigsaw puzzle pieces in the case Xiao Lin is helping investigate conceal important information. In the women's disappearance case handled by Lao Wang, the victim's family receives a mysterious letter pointing to an unsolved case from years ago.

As they investigate, they uncover a vast conspiracy involving powerful elites, organized crime, and a mysterious organization. Along the way, they encounter people from all walks of life, including a grocery store owner, an old factory worker, and a woman living alone. Everyone seems to be hiding a secret.

They narrow their focus to several suspects, only to find the leads repeatedly going cold and themselves trapped in one predicament after another. But they never give up. They continue to investigate and piece together the clues, determined to uncover the truth and save a city sinking into darkness.