Julien Pardot (Michel Serrault), a midlife failure as the family breadwinner, opens an investment firm and nobody beats a path to his door. He notices that other people refer to having to consult their associates, so he invents a mysterious British associate, Mr. Davis, and puts his own advice through his partner’s non-existent mouth. His business takes off with a vengeance and soon he’s got a big house and, in a touch that wouldn’t be in any American remake, a guilt-free mistress on the side. Before long, the clamoring world gives Mr. Davis credit for everything and Pardot feels Davis taking over unless he can get rid of him. In a logical escalation, anything that happens to Mr. Davis may trigger a financial crisis and economic collapse, not to mention personal calamity for Pardot.