The true story of Sir Nicholas ‘Nicky’ Winton, a young London broker played by Hopkins, who, in the months leading up to World War II, rescued 669 children from the Nazis. Nicky visited Prague in December 1938 and found families who had fled the rise of the Nazis in Germany and Austria, living in desperate conditions with little or no shelter and food, and under threat of Nazi invasion. He immediately realised it was a race against time. How many children could he and the team rescue before the borders closed?