Northern Poland, 1940: at the Nazi war camp Stalag XX-A, two men struck up an unlikely friendship which led to one of the most remarkable wartime escape stories ever told. Antony Coulthard was the privately educated son of wealthy parents with a degree in modern languages from Oxford. Fred Foster, the son of a bricklayer, had left school at 14. This mismatched young pair hatched a plan to disguise themselves and simply walk out of the camp, board a train, and head straight into the heart of Nazi Germany. This audacious plan involved 18 months of undercover work, including Antony spending 3 hours each evening teaching Fred German. They set off for the Swiss border via Germany, but when they reached the border town of Lake Constance, with Switzerland within their reach, Antony crossed over into freedom, while Fred’s luck ran out. What happened to them both next is both heartbreaking and inspiring.