Recently the victim of a car accident, Paul, a teacher, is no longer the same man. He no longer shows any interest in his environment and, even more worryingly, he seems to have become impervious to all feelings, all emotions. His wife, Marianne, and his mistress, Luisa, are of little more interest to him than his students, which is to say very little. Desperate, Luisa meets Marianne to try to understand.