As the 'Maid of Orleans' sets sail for Boulogne, two men wave goodbye to their trusting wives, who are completely unaware that their husband's intended 'golf holiday' is a ruse. One of the men is Captain Hugh 'Bulldog' Drummond - a demobilised officer with a fierce appetite for adventure and ale; the other is Bulldog's loyal friend, Peter, who narrates this exciting tale of a man in fear of his life and in desperate need of their help in penetrating the ill-omened Temple Tower.