Monika from Stockholm falls in love with Harry, a young man on holiday. When she becomes pregnant they are forced into a marriage, which begins to fall apart soon after they take up residence in a cramped little flat.
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.
Dr. Vogler's, a nineteenth-century traveling mesmerist and peddler of potions, magic is put to the test in Stockholm by the cruel, eminently rational royal medical adviser Dr. Vergérus.
