Eight Hundred is a gripping thriller set in the late 1990s, in the quiet mining town of Fengyang. The town is plunged into turmoil when the body of an unidentified woman is found. Police officer Chen Hong Bing leads the investigation, quickly noticing distinctive glass fragments on the victim, matching those from a bottle used for a banned drug. His suspicions deepen when he discovers someone in town consuming this illegal substance. Determined to expose the truth and dismantle the drug trafficking network, Chen Hong Bing and his team delve deeper into the town's dark secrets. However, the investigation takes a shocking turn when he realizes the mastermind behind the operation is someone intimately close to him. This revelation forces Chen Hong Bing to confront an agonizing dilemma between his duty to uphold the law and his loyalty to family. Fengyang and its inhabitants are thus compelled to make difficult choices between good and evil, as the town faces a profound test of its moral fabric.