Less than a year after World War II began, Hitler's armies occupied much of mainland Europe... and the island nation of Great Britain stood alone. Rather than wait for the expected German invasion, Prime Minister Winston Churchill decided to hit back at the Nazis any way he could. In the summer of 1940, he set up a secret new organization called the Special Operations Executive, or SOE, and gave it a simple mission: set Europe ablaze. Secret War goes inside Churchill's secret army, to a dangerous world of agents, double agents, and even triple agents. In 13 episodes, it tells the story of SOE agents and other clandestine warriors who went behind enemy lines to conduct intelligence-gathering, sabotage, and assassination. Sometimes the operations were spectacularly successful, at other times inexplicably inept. But together, the efforts of these intrepid men and women helped save thousands of lives, liberate Europe, and turn the tide of World War II.