The young siblings at the Hejrenæs estate, Vibeke and Hans-Henrik, have always gotten along well, so Hans-Henrik decides to celebrate his sister's 21st birthday with a big party at the estate. During the party, the siblings' childhood friend, Ulla, provokes an engagement with Hans-Henrik, and at the same party, Vibeke learns that she is "only" an adopted child. From that day on, Vibeke realizes that she is in love with Hans-Henrik, and suddenly the stage is set for a sharp conflict between Ulla and Vibeke.
| Actor | Role |
|---|---|
 John WittigGodsejer Hans Henrik Thann | Godsejer Hans Henrik Thann |
 Astrid VillaumeVibeke Thann | Vibeke Thann |
 Karin NellemoseTante Sofia | Tante Sofia |
 Maria GarlandTante Hortense | Tante Hortense |
 Lisbeth MovinUlla Biehle | Ulla Biehle |
 Ib SchønbergGodsinspektør Sejersen | Godsinspektør Sejersen |
 Johannes MeyerHerskabstjener Blackhøj | Herskabstjener Blackhøj |
 Knud RexSkovfoged Ulf Henningsen | Skovfoged Ulf Henningsen |
 Bendt RotheFabrikant Helge Knudsen | Fabrikant Helge Knudsen |
 Carl HegerDyrlæge | Dyrlæge |
 Peter PoulsenSavværksbestyreren | Savværksbestyreren |
 Jakob NielsenSkovarbejder Martin | Skovarbejder Martin |
| EEgo Brønnum-JacobsenGæst, der smider tateren ud | Gæst, der smider tateren ud |