Fernand has escaped from prison and finds shelter in the traveling circus Barlay, where his former wife Flora works as a predator trainer. Their son, now grown up, Marcel is an art rider and does not know that Fernand is his father. Marcel loves Yvonne, the daughter of director Barlay. He is against the connection, sends his daughter to Italy and convinces Marcel that Yvonne does not return his feelings.

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.

This Nazi propaganda film tells the story of a young truck driver who is having trouble making ends meet until he is exposed to the teachings of Adolf Hitler, and he joins the S.A., aka Storm Troopers, and manages to convert his father--a former soldier with Marxist leanings--and his girlfriend of the rightness of the Nazi cause.