The “Girl on The Train”, Rachel, played by Emily Blunt, takes a commuter train each day into Manhattan and back. The train pauses in its journey opposite a house where she sees a seemingly perfect couple, Scott and Megan. Rachel, an aspiring artist, sketches the beautiful Megan (Haley Bennett) from her vantage point of the train carriage.
In the depths of the cold war a Russian agent Rudolf Abel (actually a KGB colonel called Vilyam Fisher, though the movie does not reveal this), played by Mark Rylance, is arrested. The US bar council asks a prominent attorney called James Donovan (played by Tom Hanks), who made his name at the Nuremberg Trials but now works in Insurance, to take on the role of defending Abel – they want American justice to be seen to be done before Abel is inevitably convicted and possibly executed.