An American drifter comes to a remote Polynesian island controlled by a Puritanical missionary and turns the social life of the island upside-down.

CIA agent Harry Wargrave is sent to aid Gen. Marenkov, a senior Russian official, who is defecting to the west. Wargrave decides they should travel to safety on a train across Europe, the "Atlantic Express". During the journey, they must survive attacks by terrorists and an avalanche, all planned by Russian spy-catcher Nikolai Bunin.

Alfred Eaton, an ambitious young executive, climbs to the top of New York's financial world as his marriage crumbles. At the brink of attaining his career goals, he is forced to choose between business success, married to the beautiful, but unfaithful Mary and starting over with his true love, the much younger Natalie.