A Russian lady singer in Germany falls for a countryman working in a car factory there, who unknown to her is really a grand Duke. an attempt to steal the famous Orloff diamond adds to the complications.
Since the envisaged tour guide for a tourist crowd on the way to Italy is allegedly suddenly prevented, the secretary of the travel agency must unexpectedly step in and accompany the group on the bus.
Her rich uncle is coming from America so a woman has a clerk in her father's store act as her husband. Until the fake husband loses his clothes while using a washroom.