When the heroes of Fukuoka return after shooting "HEROHOUSE" in Nokonoshima, the find out that Fukuoka has been occupied by the Secret Society of Evil, which has acquired a mysterious power. After Ohgaman, the only hero who didn't participate in the "HEROHOUSE" shooting, was badly injured near a young man named Tanaka Jiro, he gives Jiro the mission of restoring peace in Fukuoka.