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?
堀雄二
as Detective Nagata
山本麟一
as Detective Kaneko
中山昭二
as Detective Yamagata
松本克平
as First Investigation Section Chief
神田隆
as Chief Investigator
松村達雄
as Doctor
沢村貞子
as Madam next to Hikariso
利根はる恵
as Yasuko's Mother-in-Law
織田政雄
as Yasuko's Father
星美智子
as Matsue
花沢徳衛
as Detective Hayashi
須藤健
as
