Cécile and Alain have been living together for twenty years. He runs a small hi-tech engineering company in Grenoble that is doing well – extremely well – and although she has no need to work, Cécile continues to teach at the local high school. They are a wonderful, indestructible, model couple, to the great chagrin of their doctor friend, Georges, who is not insensitive to Cécile's charms.