Hilarity ensues as Lorelei becomes rather friendly with a rich old owner of a diamond mine (he gives her his wife's prized diamond tiara!), and Dorothy becomes smitten with a private detective hired by the father of Lorelei's fiance to track her every move.
The women have to become very crafty in order to evade jealous fiances, angry wives, incriminating rolls of film, and French prison sentences. "I can be smart when it's important, but most people don't like it." Doesn't that sound just like a Marilyn Monroe line?