When Gabriel and Emilie meet by chance, he offers her a ride, and they spend the evening talking, laughing and getting along famously. At the end of the night, Emilie declines Gabriel's offer of "a kiss without consequences". Emilie admonishes him that the kiss could have unexpected consequences, and tells him a story, unfolding in flashbacks, about the impossibility of indulging your desires without affecting someone else's life.

Joan is no longer in love with Victor, but it pains her to feel she is being dishonest with him. Alice, her best friend, reassures her: She herself doesn’t feel passionate about her partner Eric and yet their relationship is smooth sailing. She has no idea he is having an affair with Rebecca, their mutual friend. When Joan finally decides to leave Victor and he disappears, the lives of the three friends and their relationships are turned upside down.