In Paris, Corinne "Coco" brings her chief Valérie to spend the Christmas Eve with her family. Valérie is depressed since she is newly divorced and Coco decides to tell the story of her sister Isabelle to Valérie to cheer her up. Isabelle is a dentist that has been living with and working in the same office of her boyfriend Pierre for ten years. When they decide to get married, Isabelle and Coco are worried about the family curse that every first marriage ends in divorce. Isabelle and Coco arrange a marriage for Isabelle with a student in Copenhagen so that she can immediately divorce to marry Pierre to live happily ever after. In the flight, Isabelle meets the inconvenient free-spirited tourism columnist Jean-Yves that is traveling to Kenya. When the student does not show up, Isabelle decides to travel to Kenya to marry Jean-Yves. She has the chance when they travel to visit a Masai people when they get married. Isabelle returns to Paris and when she goes to schedule her wedding with Pierre, she discovers that Jean-Yves has registered his Masai wedding certificate in Paris. Now Isabelle travels to Moscow expecting to force Jean-Yves to sign the divorce papers. Will she succeed in her intent?