Paul Braconnier and his wife Blandine only have one thing in mind: to find a way to kill each other without risk. After listening to a radio show, Paul decides to go to Paris to meet a famous lawyer in the acquittal of the murderers. He tells the lawyer that he killed his wife. The lawyer asks Paul to reconstruct the circumstances of the drama. Without knowing it, he explains, in spite of himself, the way for Paul to murder his wife by putting the odds on his side to avoid death penalty or even be released...
The story begins at a concert during which Beethoven's Concerto in D major for violin and orchestra is performed. Romaine, a mysterious woman, is in the concert hall. Pierre, her husband, is first violin of the Orchester Colonne. That evening, she discovers Marcel, a brilliant concerto soloist, and falls in love with him. Pierre and Marcel are friends, which complicates the situation. Pierre invites his friend to the house, without suspecting what will happen. The young woman, trying to find a clever pretext for a one-on-one meeting, quickly reveals her feelings to Marcel.
Arianne, a young Russian maid living in France, meets a man twice her age she falls in love with.
While cleaning her gloves which she was to wear at a ball, Cecilia meets with an accident and becomes blind. Her slim resources are soon exhausted, and being unable to work, the poor girl is soon brought to distress. Led by her little sister, she is forced to beg. Young Doctor Humbert, noticing the young girl one day, becomes interested, and persuades her to go to his offices, where he operates upon her, and in time the girl recovers her sight. Meantime, the young doctor has fallen in love with his pretty patient, but feels it is a rather delicate matter to declare his affection for the girl, under the circumstances, and cannot gain sufficient courage to do so. At the same time Cecelia acknowledges to herself a love for the doctor which she dare not hope even may be returned. All seems very hopeless when, upon leaving the room one day, Dr. Humbert, thinking himself unobserved, out of the ardor of his love, throws a kiss to the girl of his choice. Cecilia, however, has been watching ...
During a wedding party, according to tradition, hide-and-seek is played in a local abandoned castle. The bride falls into a hidden corridor. As she enters a room, the door falls shut behind her. Inside, she finds a dead woman and a book that says she cannot get out of here. However, a cat taking her scarf outside is her salvation. The cat puts the searchers on the right track, and the groom finds his bride.