Naval commander Charles Sturm has made life miserable for his wife Diana due to his insane jealousy over every man she speaks to. His obsessive behavior soon drives her to the arms of a handsome lieutenant. When Charles learns of their affair, he plots revenge.

Love, lust, possession, money, social standing, and addiction. Elsa Carlyle is impulsive and a gambler; though loved by her husband Jeff, she's spoiled and selfish, concerned with social standing. Meanwhile, Jeff wants to keep a lid on spending while he completes business deals that could make them rich. One night, on a hunch, she bets and loses big at a casino, then she doubles her problems with more impulsive decisions. Hardy Livingston, a wealthy Casanova just back from the Orient, makes a play for her. Elsa dallies with Hardy, but soon, his insistence and her dire financial affairs seem destined to lead to adultery. Who's the cheat?

A beautiful temptress re-kindles an old romance while trying to escape her past during a tension-packed train journey.