Sylvia has it all and believes she deserves it: a good life with her hard working and caring husband Vincent... and a stimulating affair with her passionate lover Paul. Usually, there is no problem - Sylvia efficiently keeps these two sides of her life separate. But when Paul gives her a gorgeous necklace as a present, Sylvia's vanity gets the better of her: She wants to wear it whenever she likes - she deserves that as well! But how to do that without Vincent getting suspicious? Sylvia devises a plan... But she has to learn that even the most cunning are eventually outsmarted.