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.

Everyday and social drama. In Vienna a girl from the people about social prejudices finds away the esteem and love of an airplane industrialist.

The daughter of the Parisian countess Lafitte, named "Baby", is supposed to go to an English boarding school, but she's much more interested in variety shows. Nevertheless, she travels with her friend Susette to London, who also wants to make a career for herself as a showgirl. During the journey, Baby is mistakenly considered to be a showgirl and she does nothing to dissuade two young English lords from believing so. The girls continue to live under false pretenses even when they arrive in England, with Baby being a soloist with the group "Babies" and Suzette passing herself off as the Contessa Lafitte for school exams. At the end -- a double marriage.

To receive his fiancée and his father at his home, an Oxford student counts on the presence of his aunt from Brazil to serve as his chaperone. The latter having delayed his trip, the young man passes his servant off as his aunt. This results in multiple misunderstandings. Finally, everything works out when the aunt comes.