Rolf, a sex-advice columnist and a lecher, has affairs with numerous women, but never a permanent relationship. Suzanne, one of his ex-lovers, offers to bet that no woman can get Rolf to propose marriage, a bet her girlfriend Andrea eagerly accepts. But there's a catch: To win the bet, Andrea must get the womanizing Rolf to commit to marriage without first going to bed with him.
| Actor | Role |
|---|---|
 Sybil DanningAndrea | Andrea |
| MMichael CromerRolf | Rolf |
 Marlène AppeltSusan | Susan |
| KKatja BücheleVera | Vera |
| UUlla KopaAnn Marie | Ann Marie |
| FFernando GómezFrank | Frank |
| HHeinz Peter SchuckRobert | Robert |
| OOlga BringmannMonica | Monica |
| FFelicitas PetersDoris | Doris |
| NNino KordaStempel | Stempel |