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Belle Mentalle (Wonderful Mentality) stars Jean Richard as Honore, a valet blessed with the inability to tell a lie. In addition to his honesty, Honore is also supremely logical, a character trait that comes in handy for his master, lawyer Maitre (Jean Martinelli). The valet not only saves Maitre's business, but his marriage. Alas, Honore's candor and wisdom does good for everyone but himself--until the film's twist ending. The film's effectiveness rests almost solely in the comedy prowess of star Jean Richard, who does wonders with the thinnish material at hand.