Une pure affaire (2011)

David Pelame, an unremarkable lawyer, easily lets himself be pushed around by his most ruthless rival at the firm. One evening, while walking his dog, he finds a bag full of cocaine. At first, unsure what to do with it, he decides to sell the goods, with a very subjective idea of what being a dealer entails. Although his family life becomes more pleasant and his relationship with his wife more tender, at the firm he gains a certain confidence that helps him deal better with others—and, as a bonus, get rid of his rival. However, he faces disapproval of his new line of work, but the money is so easy to earn that everyone gets into the business. Then one day, the person the bag and its contents belong to turns up…