Based on the true story about the Dunkirk Beach evacuation that took place in 1940. German forces pushed the allied army of the British and the French to the beach, where over 300,000 men, would be sitting ducks as there were very few vessels to carry out the mass evacuation. Civilian vessels were called in to help with the rescue. This film follows three stories, one involves a small group of soldiers attempting to flee from the beach, another focuses on one of those aforementioned boats and the last showcases two British fighter pilots trying to protect the ships from enemy planes.