Philippe, an employee at the Bourdinet firm, having been caught kissing Jacqueline, his boss's daughter, is fired. Some time later, Bourdinet launches a radio quiz show to boost his business. Philippe then decides to compete in the hope of telling the thousands of listeners what he thinks of the industrialist. A blow on the head having given him a gift of second sight, the competitor becomes impeccable and wins astronomical sums to the great despair of Bourdinet. Everything will work out in the end and Philippe will be able to marry Jacqueline.

À la suite d'un quiproquo, Philippe, sympathique jeune homme, est amené à participer par Fernand, un concurrent malchanceux, à l'émission radiophonique Cent francs par seconde. Un coup sur la tête développe en lui un don de voyance qui lui permet de répondre brillamment à toutes les questions et de gagner des sommes folles.