Emiko Tanaka

On a quiet spring day in the suburbs, a stray dog found the corpse of a baby. Three days after his death, the blood group of the victim was determined. Detectives Hayashi, Kaneko, Nagata and Yamagata begin their investigation, suspecting the parents of the murdered child. They use a towel, baby diapers and bruises on the baby's body as clues in the investigation. Who killed the baby?

The murder took place at a hotel in Matsushima. The victim is a woman about 28 years old. The suspect is a young man who visited her the night before, and the evidence, in addition to shoe horns and handkerchiefs, is soap with the name of the tavern. When detectives at Shiogama Station followed the man's tracks, it turned out that he had come from Ueno.

A burnt corpse of a man was found in Okutama. As a result of the investigation, it turns out that the criminal strangled the victim with a bandage, smashed his face with an oil canister and burned the body, trying to hide the identity of the victim. But the investigation establishes that the victim is a former criminal named Hisashi Sayama. According to Sayama's daughter-in-law, a man named Kitamura got him a job, so he left home with a copy of the family register. Trying to find the killer, the First Investigation Department is investigating all over the country, including Akita, Yokkaichi and Okinawa.