Beniya Shoji and Tokyo Medical Equipment were engaged in a fierce battle to sell medical equipment to a medical school. Saeki worked as a reporter. Saeki's sister Akiko was the wife of Eto, an elite salesman at Beniya. Eto killed the president of Tokyo Medical Equipment and jumped to his death, and Akiko was raped by a hitman named Nozawa. But was Eto really the murderer? Saeki, who found out that Tokyo Medical Equipment was blackmailing Beniya for bribing the medical school, decided to solve the dark mystery...