The 17-year-old student Rosy (Heidi Hansen) wants to improve her pocket money: For a pledge of at least a hundred marks, she hands over a key to older men and allegedly her address. Lots of love-goers fall in on the trick. - Fluent comedy.
| Actor | Role |
|---|---|
 Horst TappertStubenrauch | Stubenrauch |
 Heidi HansenRosy Baumgartner | Rosy Baumgartner |
 Uwe FriedrichsenDr. Walter Bertram | Dr. Walter Bertram |
 Margot TroogerFrau Stubenrauch | Frau Stubenrauch |
 Margot HielscherFrau Baumgartner | Frau Baumgartner |
 Siegfried SchürenbergGottwald Baumgartner | Gottwald Baumgartner |
 Jutta SpeidelInge | Inge |
 Ethel ReschkeNot listed | Not listed |
 Inge WolffbergNot listed | Not listed |
 Horst PinnowNot listed | Not listed |
 Sigrid von RichthofenNot listed | Not listed |