Liebe ist zollfrei

Newlyweds Käthe and Max met while studying law. Trouble ensues when Max takes on his first case without telling his wife.

Mathilde Kratzer owns the entertainment venue "Bei Mathilde" (At Mathilde's). Her roommate Max also has a financial stake in the establishment, but only as a silent partner, which is why he works either as Mathilde's servant or as the bouncer. He would love to rename the venue "Bei Max und Mathilde" (At Max and Mathilde's), but Mathilde would rather return his investment. Because she can't afford to do so, Max is in financial trouble and is being relentlessly pursued by the tax authorities.

Dan Douglas is a typical Scottish. When his niece Evelyne marries engineer Fred Keller aboard the ship to Scotland, he gives her a pearl necklace as dowry, but it's false. The newlyweds face their differences when the necklace gets lost.

Herr Eickmeyer is a wealthy parfumier: well past middle age, and stout with it. His blonde wife Lissy is much younger, pretty and vivacious. Since Eickmeyer can't keep up with his young wife, he commissions a companion for her in the form of a life-sized talking clockwork man, purchased for 5,000 deutschemarks ... to be shipped to his home immediately it's assembled.

A moron buys a worthless piece of land, which a swindler passed off as an oil field.

Composer Franz Schubert becomes involved with a family with three daughters, falling in love with the two blonds, first one, then the other; but will he notice the quiet brunet third daughter, who has fallen madly in love with him?

When the mathematics teacher discovers a love letter from his daughter, family father Felix Schneider is suspected of having a secret lover.

On the occasion of a charity ball in Vienna a kiss of a famous actress should be auctioned. Misunderstandings between the manager of the film star, a record producer and a student lead too all kinds of mistakes, during which a student is mistaken for a prince in disguise and almost breaks his hapiness. - Quickly and expertly produced mistake comedy with a lot of singing desposits and an at than popular comedian line-up, which offers amusing surface entertainment.

Jenny confronts her cousin Harry: Did he embezzle her fortune? No. But he escapes with married lover Germaine only to return quickly because her husband pursues them. Jenny is convinced Harry is his own double and arrests him at gunpoint.

The film is an adaptation of the 1891 operetta Der Vogelhändler by composer Carl Zeller, with libretto by Moritz West and Ludwig Held, though it incorporates few of the original songs, using them mostly instrumentally or in the background. The plot follows Adam, a Tyrolean bird seller in 18th-century Rhineland, who hopes to marry his beloved Christl, a postmaster's daughter; to secure his future, she arranges for him to perform at court, but complications arise when she is mistakenly suspected of an affair with a philandering prince.

Klementine Plamershof is a fun-loving young woman. She has long been “confined” to a girls’ boarding school, where she is studying music with growing reluctance.