Une fin d'après-midi radieuse. Un soleil presque sirupeux dans les rues paisibles de la Rive Gauche. Et partout, sur les visages, dans les mille bruits familiers de la rue, de la joie de vivre. Il y a des jours ainsi, où...
Martin Brand's relatives are furious that he's left his large estate to his niece, Marion, whom he had only met once. And Marion is upset that she has to share her new home with Martin's family. Then a body is found on the beach wearing her coat....