Major John Dodge organizes the escape of prisoners from a German concentration camp. Seventy-five prisoners attempt to escape, but only fifteen succeed. The rest are caught and shot. Major Dodge is among those caught and faces certain death, but German doctor Toast helps him escape to England. After the war, Dodge returns to Germany, to the site of the former concentration camp, and then, together with the former prisoners of the camp who managed to survive, he organizes and carries out a terrible plan of revenge against their executioners, whom they find all over the world and destroy.