Luftwaffe fighter pilot Franz von Werra is shot down during the Battle of Britain and captured. At the POW reception centre, Air Defence Intelligence, located at Trent Park in Cockfosters, near Barnet in Hertfordshire, he wagers with his RAF interrogator that he will escape within six months, Initially, von Werra is sent to No 1 prisoner-of-war (POW) camp Grizedale Hall in the Furness area of Lancashire, His first escape involves dropping over a wall he is lying on during a group walk. He rolls over a horse and cart passes