A dead beauty is found in the trunk. Kubota (Miaki), Okayama (Kawazu) and Tsuji (Funakoshi) begin investigating this mysterious crime at the investigation headquarters. Since the cause of death was poison gas, he asked Yusaku Tominaga (Tsukigata), a now retired drug crime specialist, to cooperate. Kubota and his friends soon find the house of the murdered beauty and upon entering, they are surprised to find another corpse, this time of a man…