Venetian Nights.

After winning a cash prize in a contest a young woman decides to visit Venice. She hires a secretary, a wealthy young man in disguise, to accompany her on the holiday. Once in Italy she attracts several suitors but her real love is her secretary. When she discovers he has deceived her she returns to Berlin on the express and he pursues her to try and declare his love. Loosely based on the 1883 operetta Eine Nacht in Venedig (A Night in Venice) by Johann Strauss II, it was a French-language version of the 1931 German film The Love Express.