The Hikawa Research Institute, which was secretly developing the "Gigantor Project," is blown up by the vicious criminal organization PX Group, and the latest model "Gigantor 28" is stolen. Young detective Shotaro Kaneda, who has been ordered by the Metropolitan Police Department's Zero Division to recover Gigantor, infiltrates the PX Group's underground base with gangster Ryusaku Murasame! The PX Group's traps and rampaging robots attack them. What will be the fate of the young detective!? Witness the miraculous chemical reaction between manga master Mitsuteru Yokoyama and Fumiya Sato of "The Kindaichi Case Files" fame!