It's 1940 and only a narrow strip of sea lies between Great Britain and invasion. What's needed is a morale-boosting war film. As bombs start to fall on London, work begins on an almost-true tale of bravery and rescue at Dunkirk. But call-up has left the film industry with the jaded and the utterly unsuitable.There's Catrin Cole, copy-writer turned dialogue specialist; Ambrose Hilliard, third most popular British film star of 1924; Edith Beadmore, ex-seamstress and ex-Londoner, having been bombed twice; and Arthur Frith, whose peacetime job as a catering manager hasn't prepared him for sudden elevation to Special Military Advisor. In a city visited nightly by destruction, they must work together to produce a slice of the purest entertainment...