1936 French film by Richard Eichberg and Jacques de Baroncelli

Faithfully reproduced observations of Breton fisherfolk in story of the man a local woman really loves who will not at first give himself to her because of his fondness for the sea that takes him away.

During a French construction project in the Sudan, a military doctor fights against leprosy and the natives seek protection against witch doctors.

Jérôme owns a boat with his crook of an uncle, La Rose de la Mer. They sail with a band of crooks hired by the uncle to scuttle the ship and collect the insurance premium.

A woman's marriage is on the rocks ; to avenge herself, she decides to take a lover for one night .So she buys all his stock from a balloon man and flies them through the Parisian sky ; all her balloons carry a message :"I will be alone after midnight" (hence the title); a lot a suitors comme to the rendezvous : a fisherman, a soldier, a traveler , a gentleman cambrioleur (a nod to Arsène Lupin?) and others ,much to Michel, a young man in love with her's displeasure.