A young girl, Gaby, advertised in a newspaper to find a husband. Berthier, director of a telephone exchange, answered it. Yvonne, a charming telephone operator, has been invited by a subscriber, Vanetti, a married man looking for entertainment in the absence of his wife. The four young people have agreed to the same meeting place and will find the wrong partner. Gaby will spend the evening with Vanetti and Yvonne with Berthier.
