Early in the 20th century, middle-aged lawyer Fredrik Egerman and his young wife, Anne, have still not consummated their marriage, while Fredrik's son finds himself increasingly attracted to his new stepmother. To make matters worse, Fredrik's old flame Desiree makes a public bet that she can seduce him at a romantic weekend retreat where four couples convene, swapping partners and pairing off in unexpected ways.
Gunnar Björnstrand
as Fredrik Egerman
Ulla Jacobsson
as Anne Egerman
Eva Dahlbeck
as Desirée Armfeldt
Harriet Andersson
as Petra
Margit Carlqvist
as Countess Charlotte Malcolm
Jarl Kulle
as Count Carl Magnus Malcolm
Åke Fridell
as Frid
Björn Bjelfvenstam
as Henrik Egerman
Naima Wifstrand
as Desirée's Mother
Jullan Kindahl
as Beata
Gull Natorp
as Malla
Birgitta Valberg
as Actress
