Set during World War II, the story follows a group of prisoners held in a Nazi concentration camp in occupied Poland. Despite being from different backgrounds and nationalities, they form an alliance to escape. They are led by Captain Michael Rhodes, a resourceful British intelligence officer who plans a daring break-out involving forged documents, secret tunnels, and betrayal from within the camp. Tensions rise as an enemy officer, Hauptsturmführer Klaus Eberhardt, becomes suspicious and launches an intense investigation, threatening to unravel the entire plan.