Yayoi Kagetsu, aka Red Moon, works as a female detective conducting undercover investigations by day, while by night she fights to protect the world from criminals who evade the law, delivering justice with her own hands. The evil organization Satan Cross, having discovered her true identity, launches an invasion of this world under the command of its leader Satan, sending assassins Cerberus and Chimera to seize control. Satan Cross aims to dominate the globe by spreading the highly potent Level-A drug Madness. The battle between Red Moon and Satan Cross escalates into a fierce clash between good and evil. Captured through underhanded tactics, Red Moon is subjected to torturous interrogation, but her voice never turns to screams. In the end, she triumphs and achieves a happy ending.