A series of stupid coincidences causes the young Munich painter Paul to convert his uncle's castle into a hotel for four weeks. But he can't complain: business is good and he has plenty of guests. For exmple, there's Theo Muller with his revue troupe. For reasons of "sound", Muller calls himself "Miller", which, of course, causes more confusion. His daughter, the beautiful Evelyn, is confused with Mabel Miller, who has come to the hotel on a mission for her filthy rich father ... namely, to estimate the worth of the castle.

Jimmy Bolt, a singer and dancer (and occasionally as a waiter) works at a varieté. The man may be talented, but he’s not exactly a big success, and things get complicated when a young orphan girl falls in love with the voice of another singer but then mistakes Bolt for him…

In the very old-fashioned town of Ostend suddenly 13 suitcases are delivered to the Grand Hotel, with a note, that O.F. will be here soon and needs 6 rooms. This event, probably the biggest in 300 years, starts a small wave of modernisation, yet everybody is wondering who O.F. is.

During WWI a German agent receives an order to find out when the Russian army will carry out its expected attack against the German lines.

First adaptation of Hans Fallada's novel of the same name.

Operetta diva Tilla Morland is celebrating her latest stage success with her friends at the Carlton Bar. At everyone’s request, she begins to sing the show’s main hit. While she is singing, a young man ostentatiously leaves the bar. Tilla cannot forget this incident, which she finds outrageous, and to her surprise, she recognizes the very same patron in her newly hired secretary, Ulrich Weidenau.

The stenotypist Margit is supposed to take 3,000 Marks to the bank for her boss, Mr. Plaumann, but she lazes away the time window-shopping, and eventually stands before a closed door. She follows Plaumann to Dresden, where he, believing the money is deposited in a bank as a down payment, wants to purchase a newfangled remote control from the inventor Lambach. Since Plaumann’s car breaks down on the road, Margit arrives before him and rests in the seemingly empty hotel room which later turns out to be Lambach’s. Meanwhile, Lambach himself is being spied on by the jealous cousin of his fiancée, who can’t wait to catch him in the act…

Miss Inge Becker is a telephone operator. She makes an appointment with her unknown opera singer West. Simultaneously, Rainer, the young director of the telephone distribution, makes an appointment with him unknown Miss Lotte Schröder. The location of the meeting and sign of recognition of the two pairs are the same. An exchange with consequences cannot be avoided, as the next day the director wants to speak with Inge, because she neglects her service.