The choral society of the town of Kirchzell is preparing to celebrate its anniversary. Of course, its most famous scion, the world-famous chamber singer Karl Koller, is not to be missed. Unfortunately, the reunion is watered a little too much, which has its pros and cons.

The engineer MacAllan designs a tunnel, which will join America and Europe together on the seabed. A group of American billionaires are financing the gigantic project, but the construction of the tunnel is proving to be as tedious as it is dangerous. MacAllan's worst enemy is the speculator Woolf, who had embezzled the money for the construction and who is attempting to cover up his crime by carrying out acts of sabotage. Also filmed in 1933 in a French-language version, LE TUNNEL, and remade in 1935 in England as TRANSATLATIC TUNNEL.

Two retired Bavarian traffic police officers and a Berlin detective work together to track down jewelry thieves.

The local council of the Bavarian village of Mooskirchen has ambitious plans for the small town. Mooskirchen is to become a tourist destination, but this requires money, because at the moment there is not even an access road to the highway, let alone such "attractions" as a spa or a swimming pool. When one day a letter arrives at the town hall informing the community that Mooskirchen has received a huge inheritance, all problems seem to be solved. However, the inheritance is a huge plantation in Africa, valuable but very far away. Ferdl Lechner, the mayor of Mooskirchen, decides to travel to Africa with his friend Karl Köpfle to officially take possession of the inheritance. First of all, they go to Hamburg. The two rustic Bavarians want to enjoy life in the big city for a while, but the two provincials are not up to this kind of jungle.

Cafe owner Paul Perlacher is a real pig: not only are his daughter and sister Trude embarrassed constantly by his disgusting behavior, but his tenants are subjected to every legal trick under the Sun to get them to move out. Nevertheless, Amalie Hartning's a stubborn woman and can take care of herself well when it comes to her tyrannical landlord. If that weren't enough for Paul, his daughter's gone and fallen in love with the nephew of this pain in rear! And when Paul's ordered to jail by the courts, that really is the last straw.

A pop singer who has been successful on Broadway, is homesick and returns.

Jonathan, a well-fed ship's cook, and his friend Michael go ashore in an oriental port city after a long sea voyage. They cannot resist the lure of an enticing drug den, where they are mercilessly plied with drink and robbed. They find refuge with the wealthy passenger Hieronymus Walden, who is staying at a luxury hotel. However, the two Bavarians must agree to rescue his granddaughter Kathi, who has disappeared into an oriental harem.