1903. The British Empire has reached its probable apogee: so much of the world map is coloured red and the sun never set on its boundaries. But Lord Curzon, the ambitious Viceroy of India, has different views. Tibet, the mountainous region on the Raj's borders, irritates him: the Dalai Lama never replies to his letters and border disputes multiply.

He decides to invade and recruits Simon Fonthill, veteran of so many of Queen Victoria's 'Little Wars', to lead 2000 men over the ice-bound Himalayan passes to Lhasa. Fonthill sets out on another expedition with his wife Alice, reporting for the Morning Post, and his old comrade, '352' Jenkins.

It is machine guns against muskets as the cruel and brave monks, fighting on their own terrain among the clouds, oppose the invasion. When Alice is captured, treachery is revealed, and Fonthill and Jenkins must gallop to her aid in their most arduous and thrilling adventure yet.