主角·城茂的朋友沼田五郎为邪恶组织·黑撒旦所杀，为了复仇，城茂只身潜入黑撒旦的基地，并假装自愿接受改造手术，成为电气人。但因为手术时城茂偷偷拿掉催眠装置，所以他并未被洗脑。在向大首领宣誓的时侯，城茂趁机逃脱。 在逃脱的时侯，城茂救出了被改造成电波人的岬百合子，之后两人便与黑撒旦和迪鲁扎军团的奇械人、改造魔人展开了战斗。
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