[Machine Translation] The body of a man in his 30s was found stabbed to death on the bank of the Keio Tama River. Inside a white envelope found at the scene was a piece of paper with the word "Daigyo" written on it. When Inspector Totsukawa began his investigation, he found an office worker in her 20s and a university professor in his 60s dead one after the other, each with the word "Daigyo" written on them. Totsukawa investigates the victims' pasts and discovers that their fathers or grandfathers were involved in the army's aircraft business during the war. Totsukawa sets off for Chiran, Kagoshima, to investigate the motive of a serial killer. Before long, Totsukawa unleashes an unprecedented plan to uncover the real murderer! A full-length mystery!