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.
Director: Franz Antel
Cast: Sybil Danning, Eva Garden, Alena Penz, Christiane Maybach, Claus Tinney, Wolfgang Jansen, Gernot Möhner, Sascha Hehn, Erich Padalewski, Thomas Hörbiger, Rinaldo Talamonti, Josef Moosholzer, Paul Löwinger