Rendezvous (1935 film)

Rendezvous is a 1935 spy film set in World War I, directed by William K. Howard, starring William Powell and Rosalind Russell and featuring Binnie Barnes, Lionel Atwill, Cesar Romero and Samuel S. Hinds. Powell plays an American cryptologist who tangles with German spies while falling in love.

In April 1917, former newspaperman William Gordon William Powell is commissioned in the U.S. Army. The day before he is to leave Washington, D.C. for France, he meets socialite Joel Carter Rosalind Russell at an embassy gathering. The couple spend the day together where Gordon confides that because he once wrote a book on cryptography under a pen name, the army is searching for him to put him to work behind a desk, but he is eager to get into the fighting. Just before he boards his train, Gordon is ordered to report to Assistant Secretary of War John Carter Samuel S. Hinds. Over his objections, Carter assigns Gordon to the codebreaking room to help break an intercepted German message that Major Brennan Lionel Atwill, an experienced British cryptologist, has been unable to decipher. Gordon learns that Carter is Joels uncle, and that she revealed his true identity to keep him in Washington.The U.S. is deeply concerned about the Uboat threat to its troop and supply convoys headed to France. To defeat the threat, British escorts will meet American transports before they enter the most dangerous zone. The rendezvous point will not be given to the ships until the day before they meet, transmitted by wireless in a new code devised by Major Brennan. An ammunition ship is sent first to test the new system. However a German spy ring in the city has already gained access to the code and deliberately allowed the ship through to lure more valuable troop transports into their Uboat trap. Gordon deciphers the intercepted message and realizing that the code has been compromised, alerts his superiors. A troop convoy has already sailed for France and in three days they will have to send it the rendezvous location in the no longer secret code. ........

Source: Wikipedia