An innocent little love note, written by Louise de Merival before her marriage, is the pivot about which this most vivacious comedy turns. Prosper and Anatole, cousins, love the daughters of Madame de Merival, but mama has other plans. She spirits the girls off to Paris, where Louise soon forgets Prosper and marries a baron. But Mathilda is true to Anatole. Suzanne, the girl's cousin, conspires with Louise to get back the note from Prosper. She searches his rooms and, when the baron follows Louise thither, she saves her cousin by trumping up an old love affair with Prosper, as a result of which the baron calls Prosper a scoundrel and tells him he must marry Suzanne on pain of death. Anatole and Mathilde are unwittingly drawn into the whirlpool of circumstances which revolves about the scrap of paper.