In 1789, French poet André Chénier struck up a romance with a young aristocrat.

Larry Blake is an American airline pilot who loves women and ... trouble! Wherever he goes troubles indeed follow, like this time in Paris. On vacation in the French capital, the happy American decides to discover Paris by Night. As of his first night out, he gets to know Michèle Marley, a beautiful entertainer, and looks forward to a wonderful night of pleasure. But things do not go according to plan. Indeed, Laurent, Michèle's partner is found dead and not only is Michèle accused of killing him but Larry is suspected of being her accomplice as well ...

Celestin works as an organist at a girl's school. By day, Celestin is the meek and mild target of the girls' incessant practical jokes. By night, however, he is the celebrated composer of popular operas -- and the romantic vis-à-vis of a celebrated stage star. When schoolgirl Denise stumbles onto Celestin's secret, she threatens to tell all -- but only if Celestin refuses to escort her to the opening night of his latest opera. As a result, Denise falls in love with a handsome young soldier, while Celestin is accidentally shipped off to an army camp. A series of silly coincidences brings happiness to all concerned by fade-out time.