Is There a Frenchman in the House?

Horace Tumelat is the leader of a powerful political party, the R.A.S. At the zenith of his political career, Tumelat learns of the suicide of his old uncle Eusèbe, who brought him up. It transpires that for many years Eusèbe had been holding a man prisoner in his house, a blackmailer who threatened to expose Tumelat as a Nazi collaborator. Tumelat discovers that, before he died, his uncle left him a letter, which has mysteriously disappeared. As the politician sets out to find the missing letter, he attracts the attention of the policemen who are investigating his uncle’s death – they are far from convinced that he killed himself… —Filmsdefrance.com