At nineteen years of age, Julia Weston fancies herself a capable woman, far too old to require a traveling companion. But at the insistence of her overprotective father, Julia finds herself aboard the Orient Express in the care of an approved escort. In an ill-advised demonstration of independence, Julia leaves the train on a quick errand and then re-boards and sleeps away her exhaustion. Upon awakening, however, she realizes her plan went terribly

A millionaire strikes a deal on the seedier side of Paris and gives to his heartsick daughter, Ruth Kettering, the 'Heart of Fire', one of the world's legendary jewels that once adorned the crown of the Tsars. Legend has it that the possession of the jewel leads to death - but despite her father's protests, attractive young Ruth decides to take it with her when she boards the luxurious Blue Train to the French Riviera, where she has planned a reunion