A huge store in Buenos Aires is about to close due to restrictions on imports. The owner of the store returns from a vacation in France, and knowing the financial situation proceeds to throw a big gala party. He hires a man he had met abroad to pose as a fake earl, hoping to attract wealthy clients.
The story follows Jaime Lara, a passenger whose ship makes a stop in Buenos Aires for one day. Lara elopes, leaving his wife on board, and walks around the city at night, coming to meet a beautiful yet frivolous hooker, Isa.