Two members of the French Academy agree to help the attractive young veterinarian Esther investigate the suspicious death of her sister. Esther is convinced her brother-in-law is responsible, but soon it becomes apparent that those responsible are linked to the very highest echelons of power in the Vatican.
| Actor | Role |
|---|---|
 Michel SerraultOctave Clapoteau | Octave Clapoteau |
 Michel PiccoliÉtienne Sembadel | Étienne Sembadel |
 Jean CarmetJocelyn Bouloire | Jocelyn Bouloire |
 Juliette BinocheEsther | Esther |
 MilvaRenata Palozzi | Renata Palozzi |
 Jean-Pierre BissonD'H | D'H |
 Tom NovembreLéon | Léon |
 Isabelle Petit-JacquesMicheline | Micheline |
 Agnès GarreauMuriel | Muriel |
| FFrancis Girodl'interviewer TV | l'interviewer TV |
 Gérard Kleinle journaliste radio | le journaliste radio |
 Jean-Paul RoussillonLe majordome du Bossu | Le majordome du Bossu |
 Raoul BillereyLe commissaire Brûlé | Le commissaire Brûlé |
 Maurice ChevitMaître Bongrain | Maître Bongrain |
| DDidier FlamandLe rédacteur en chef de L'Hebdo Gauche | Le rédacteur en chef de L'Hebdo Gauche |
 Alexandra LorskaNot listed | Not listed |
 Jean-Pierre MalignonNot listed | Not listed |
 Georges MontillierNot listed | Not listed |
 René MorardNot listed | Not listed |
| MMichel PascalNot listed | Not listed |
 Gérard SurugueNot listed | Not listed |
 César BaldacciniNot listed | Not listed |
 Marie-Hélène LentiniNot listed | Not listed |
 Christine PignetNot listed | Not listed |