A series of missing children incidents has occurred among the merchant families in town, but each of the children has returned in a matter of days. And yet, the client`s child has been missing for a month. Kyousuke takes on the case in place of Takuboku, who`s health is poor, and drags Sakutarou and Kodou into the investigation with him. While they`re doing that, the client`s child suddenly returns. Is this case closed? Meanwhile, the incidents involving letters of accusation thought to be finished with Tamaki`s death start up again. Takuboku sets out to discover the true identity of Accuser X.