This is the remarkable story of Donald Caskie, minister of the Scots Kirk in Paris at the time of the German invasion of France in 1940. Although he had several opportunities to flee, Caskie stayed behind to help establish a network of safe houses and escape routes for Allied soldiers and airmen trapped in occupied territory. This was dangerous work, and despite the constant threat of capture and execution, Caskie showed enormous resourcefulness and courage as he aided thousands of servicemen to freedom.