A girl disappears without a trace her skeletal remains discovered three years later. There's a suspect and compelling circumstantial evidence of his guilt but no concrete proof. Nearly 20 years ago he was tried and released due to lack of evidence for a similar crime. Chief Inspector Kusanagi of the Homicide Division of the Tokyo Police worked both cases. During an annual parade held in the neighbourhood the suspected killer dies unexpectedly. His death is suspiciously convenient but the people with all the best motives have rock solid alibis. Chief Inspector Kusanagi turns once again to his college friend Physics professor and occasional police consultant Manabu Yukawa known as Detective Galileo to help solve the string of seemingly impossible murders.