Nadia and Susanne have just met. They look uncannily alike, practically doppelgangers, but one is filthy rich, with a husband and a lover, and the other dirt poor and single. When Nadia eventually asks Susanne to spend the weekend with her husband how can she refuse the outrageous fee on offer? Nadia wants to spend a few days with her lover and convinces Susanne that the subterfuge will work. Nadia and her husband barely speak to each other, sleep in separate bedrooms, and he will be working in the office most of the weekend. So Susanne changes her hairstyle and clothes and, one Friday afternoon, drives Nadia's wine-red Alfa to her beautiful suburban villa with its indoor pool, glass doors opening on to the sloping lawn. What appears to be a harmless game becomes a deadly web of lies.