A new aphrodisiac brainwashes the proud female investigator Rena, whose beautiful legs tremble as she is driven wild with pleasure.

Reina has tracked down the organization behind an evil pharmaceutical company that has developed a dangerous aphrodisiac and is terrorizing women everywhere. Reina, who tends to act impulsively out of a sense of justice, ignores her superior's orders and begins her own investigation. She goes undercover as an advertising writer, but her true identity is discovered... She is given the super-powerful aphrodisiac that is still under development, her body becomes incredibly sensitive, and she is gang-raped and brought to orgasm...!