Scorpion Strong takes the guise of a schoolteacher in order to put the students under SHADOW's mind-control. Big Shadow feels that his plan to have the children attack the Kikaider Brothers will succeed since they will not harm human beings. One of the students, Kenji, escapes but his parents do not believe his wild story. Rieko and Kenji follow Scorpion Strong to his lair, but are attacked by the brainwashed students.