Two girls go missing, only one body is found.

Two men are united by this act of violence. Detective Saeki - whom everyone suspects is a nepotism hire at the Tokyo Met - becomes obsessed with hunting down the killer. Meanwhile, Matsumoto spirals into depression at the loss of his own daughter, seemingly at the hands of the same serial killer.

But who really are Matsumoto and Saeki? Can this one crime threaten to tear their entire lives apart? Or will their fates remain entwined until the killer is brought to justice.

After all, one body, one killer. Or is there?