In 1945, criminal investigation expert Cheng Cihang, who had returned from a study tour, encountered a dangerous situation at the dock and various forces launched a fierce battle for an iron box. In this iron box, there is a top secret archive of Japanese bacterial weapons stored. The director of the police department, Mo Caishi, stored the iron box in the secret room of the archives, but the archives were stolen at night, and the case was subsequently investigated
In 1945, criminal investigation expert Cheng Cihang, who had returned from a study tour, encountered a dangerous situation at the dock and various forces launched a fierce battle for an iron box. In this iron box, there is a top secret archive of Japanese bacterial weapons stored. The director of the police department, Mo Caishi, stored the iron box in the secret room of the archives, but the archives were stolen at night, and the case was subsequently investigated