On an otherwise normal day, Étienne, a happily married man and a good father, sees something that stops him dead in his tracks: a gorgeous woman in a billowing red dress. Long after she has left his vision, her memory continues to haunt his mind. He falls instantly in love with her and tries...
Having fortuitously discovered a photograph in which Marthe embraces someone unknown, Étienne Dorsay becomes jealous and imagines various stratagems to identify the lover. In the meantime, he and his friends acquire a weekend house for a very low price.
On the outskirts of Weimar, Edouard and Charlotte, an aristocratic couple united after both becoming widows, invite two guests to their home: a childhood friend of Edouard's called the Captain, and despite Charlotte's ominous premonition, Ottilie, Charlotte's beautiful and orphaned niece...
