When their straight-laced sister loses her job and returns home, Maria and Christel's sex lives grinds to a halt. They conspire, with the aid of a "potency pill," to change her views about sex. But little goes as planned.

Two sisters and their lovers try to make sure their older sister (played by Sybil Danning) is deflowered by every man in town. They make a potency pill so every man chases her, but the use of the pills turn into a disaster.—Robert Byrd

Nurse Elizabeth Bumshäuptl gets fired from her job at the hospital because she refuses to give in to sexual advances, and returns home to her pharmacist father [head of town morality committee] and her two sex-crazed sisters, Maria and Christel. She is quickly offered a job at the local clinic, which she rejects out of hand, but her father insists she accept. Straight-laced Elizabeth also threatens to expose her sisters' nightly shenanigans, so they conspire to put an end to her troublesome chastity. Consulting an ancient text in their father's pharmacy, they whip up a "potency pill" they think will get her laid - but Elizabeth accidentally administers it to all her horny patients at the "rejuvenation" clinic! Her siblings whip up a second batch, and see their big chance when Elizabeth accompanies her boss, Dr. Körner, to an overnight conference. Naturally, things don't go as planned, and there's a good deal of confusion as to who did what and with whom! Eventually Elizabeth and Markus get it figured out, and ...—ocoee96