During transport, a minor traffic accident alters the defense systems of an anti-terrorist security robot and causes it to malfunction and go berserk, killing several security guards. Superintendent Yakushiji and her subordinate, Assistant Inspector Izumida, are drawn to the situation which becomes complicated when Izumida's elementary school cousin, Mana, gets involved. In addition, the two police officers discover the presence of armed tactical teams of the Japan Private Police (JPP), a JACES rival and a known PMC-type security company, secretly deployed to neutralize the situation and conceal the evidence of robot's existence.