James and Andrea are bored with their predictable sex life. Both of them dream about excitement and pleasure, but they have never talked about their fantasies with each other. When they go to Paris, they agree to be in an open relationship and for the first time in their life, they get to live out their sexual fantasies with strangers. Soon it becomes clear that what they thought they knew about each other, might not be entirely true. How well do you know someone after thirteen years together?