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.
Capricious Lady Virginia has an unexpected double in a girl who works at a fair and wishes for a beauty salon. When the first one's eccentricities lead to her arrest, the second is paid for going to prison. There she meets Charles, Virginia's suitor. When out of jail she will have to fight not only for him but for going through with the leading role in a skating show.
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.