Martine Hayes is given a ticket to board The Emerald Express but she is soon embroiled in a case of mistaken identity when someone tries to kill her. She meets a fascinating author on the train and there is soon an attraction. He saves her life and whisks her off to Austria where he has a home.He asks his brother for help. The brother has a shady past and is experienced in this kind of thing. They wind up in Greece where they track down a very powerful man who has a vendetta against the man who is trying to kill Marty.