An American couple, Roy (Woody Harrelson) and Jessie (Emily Mortimer), decide to return home the long way from their recent sojourn in Pekin and meet another couple from the West, Carlos (Eduardo Noriega) and Abby (Kate Mara), with whom they quickly form that tenuous bond that often unites fellow travellers away from home.When Roy gets separated from the train at a stopover, Jessie begins to realize that their compatriots arent exactly who or what they seem to be. But the real dangers of their unforgettable trip have only begun to surface; Russian cops (Ben Kingsley and Thomas Kretschmann), mobsters, and locals are still to come.