Lorelei Lee is a beautiful showgirl engaged to be married to the wealthy Gus Esmond, much to the disapproval of Gus' rich father, Esmond Sr., who thinks that Lorelei is just after his money. When Lorelei goes on a cruise accompanied only by her best friend, Dorothy Shaw, Esmond Sr. hires Ernie Malone, a private detective, to follow her and report any questionable behavior that would disqualify her from the marriage.

Two scuba divers find a shipwreck which may contain undiscovered treasure, however, their attempt to salvage it is threatened by scavengers.

Stephen Torino, who is tricked by his brother Marco into an arranged marriage with tempestuous Annie Caldash. Annie is willing to give the union a go, but Torino wants none of it.

When newlyweds visit Las Vegas, the wife's shady past comes to the surface.