Cool and elite female detective Ria takes on a special mission assigned by the higher-ups: infiltrating an organization responsible for distributing a dangerous aphrodisiac drug that spreads sexual madness across the nation. Driven by strong justice, she begins tracking down leads alongside her partner Miho. The two successfully infiltrate the group's hideout to expose its dark conspiracy, but when Ria is exposed to the drug's effects, the "Iron Woman" descends into sexual frenzy, gradually transformed into a trained lesbian under their control. Throughout this process, she is forced to confront her own limits and hidden desires.