During the London Blitz of World War II, Catrin Cole is recruited by the British Ministry of Information to write scripts for propaganda films that the public will actually watch without scoffing. In the line of her new duties, Cole investigates the story of two young women who supposedly piloted a boat in the Dunkirk Evacuation. Although it proved a complete misapprehension, the story becomes the basis for a fictional film with some possible appeal. As Cole labors to write the script with her new colleagues such as Tom Buckley, veteran actor Ambrose Hilliard must accept that his days as a leading man are over as he joins the project.