Akiya Edogawa, assistant to detective Kogoro Edogawa, fights against the evil organization Ground. Though always treated as an incompetent aide, she secretly leads a double life as Glaiser, a warrior of the Holy Fist dedicated to destroying evil. While continuing her mission to defeat Ground's assassination robots, her activities begin drawing attention around Kogoro, alerting Ground's high-ranking officer, Shuzen Kizaki. Convinced that Glaiser is none other than Akiya herself, Kizaki hires Kogoro for personal protection and sends in the assassination robot Gonga to expose her. He then orders his secretary, Shinobu Hoshijima, to attack Akiya—setting the story on a tragic course.