In 1940's Haicheng, shrouded in deceit and danger, the notorious "76th Department" of the puppet government rules with terror. Wang Shibao, a former Qing Bang disciple, consolidates power with ruthless tactics, leaving the city in a state of fear. The Military Intelligence Unit, seeking justice, desires his downfall but lacks the right moment. The pro-Japanese "76th Department" reigns supreme, victimizing innocent civilians, patriots, and Communist Party members. At this critical juncture, a mysterious agent codenamed "The Fifth Phantom" receives an assassination mission—to cleanse the infamous No. 81 in the western suburbs. During a puppet government anniversary celebration, a key member of the "76th Department" is assassinated by underground Communist workers, alerting Japanese authorities. Five individuals involved in handling the intelligence that day are identified. To uncover "The Fifth Phantom," Hengchuan Yigu sets up a decoy, inviting the five suspects to a banquet. However, be