Mathias Ferner commits perjury and is thus able to secure the farm of his stepbrother Jakob as soon as he dies. In doing so, he deprives Paula Roth and the children of their inheritance. However, there is a letter incriminating Mathias Ferner. Years later, Paula Roth gets her hands on this letter.
Oberst Alfred Redl heads the military intelligence department of the Austro-Hungarian monarchy. Frequent letters from the Russian Empire, however, make him suspect of sharing his knowledge with unauthorized authorities.
Princess Dagmar's life is boring, so depressed - so depressed that the doctor has to come. And the doctor advises: The girl must get out of the regulated aristocratic everyday life. Princess Dagmar is sent to a girls' boarding school, located on a farm, where everyone studies hard and gets stuck in and eats simple, healthy food. In keeping with the surroundings, Princess Dagmar also falls in love with a tough country boy. He is determined to found a school where individual boys are welded together in camaraderie - so that they can find the values that will enable them to fulfill their leadership roles in the world of tomorrow. Of course, Princess Dagmar will entrust her son to him one day.
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.