Catrin Cole (played by Gemma Arterton) appears married to a handsome but struggling artist/painter Ellis Cole (Jack Huston), and against his wishes decides to get a job in order to shore up the couple’s frail finances. She is hired as a writer to help the established writing team. Catrin is sent to investigate a potentially stirring tale of a pair of twin sisters who take their drink father’s boat to Dunkirk to help in the rescue, and concludes that, despite some serious issues, the material may make a flagship propaganda film.
