Deep in wartime Germany something is stirring. Behind the barbed wire of a POW camp brave allied heroes are plotting to escape led by their daring officer. It's something he's brilliant at... the plotting that is. In 23 ambitious escape attempts RAF Officer James Forrester has suffered 23 dismal failures. Undeterred he wants to go for the Big One - an even more audacious plan to free all 327 prisoners in one go!