Gabriel Aghion directs this bawdy period romp about a day in the life of 18th century philosopher and sensualist Denis Diderot (Vincent Perez), who produced the first ever encyclopedia while living a life of delicious decadence. Though the Church immediately banned Diderot's opus, which they deemed to be a compendium of forbidden knowledge, copies continued to circulate. Diderot, along with his wife (Francoise Lepine) and daughter, are staying in the country estate of the Baron and Baroness d'Holbach -- who put a pair of illegal printing presses and a legion of typesetters in a chamber beneath the family altar. At the same time that the Church sends a grumpy Cardinal (Michel Serrault) to ferret out the clandestine press, comely Madame Therbouche (Fanny Ardant) shows up to paint Diderot's portrait. While Diderot occupies himself with his artist friend, the Baroness keeps the Cardinal occupied with her laundry list of sordid confessions. Naughty fun soon ensues.