Three young couples who are friends get married on the same day and promise to celebrate their copper wedding anniversary together in seven years. But seven years is a long time, and all three marriages are now in crisis. However, a heartfelt letter from their late teacher sets them back on the right path.
| Actor | Role |
|---|---|
 Hertha FeilerMette Zietemann | Mette Zietemann |
 Peter PasettiPer | Per |
| SSibylle von GymnichInge | Inge |
 Hans NielsenOtto | Otto |
| HHilde ClassenHedwig | Hedwig |
 Bum KrügerMr. Zietemann | Mr. Zietemann |
 Erich PontoOld teacher | Old teacher |
 Margarete HaagenMiss Truelsen | Miss Truelsen |
 Georg VogelsangJeschke | Jeschke |
| CChrista BerndlSusi | Susi |