The Lady Takes a Sailor is a 1949 comedy film directed by Michael Curtiz, and starring Jane Wyman, Eve Arden and Dennis Morgan.

When Jennifer is out sailing, a storm flips her boat upside down near an underwater vehicle operated by a man who goes by the name of Davy Jones.

What Jennifer does not know is that Davy's real name is Bill Craig, a submarine engineer undertaking a secret government mission.

When out one night at a club with her fiancé Ralph Whitcomb, Jennifer spots a woman whose pictures were in the underwater vehicle.

He tells her as much as he can, without revealing top secret information, but before Jennifer leaves, she finds and takes back her film.

Bill tries to steal the film several times, and the meeting fails, as the representative ultimately believes that Jennifer indeed is insane because of her strange behavior.