H.M.S. Surprise follows the variable fortunes of Captain Jack Aubrey's career in Nelson's navy as he attempts to hold his ground against admirals, colleagues and the enemy, accepting a mission to convey a British ambassador to the East Indies. The voyage takes him and his friend Stephen Maturin to the strange sights and smells of the Indian sub-continent, and through the archipelago of spice islands where the French have a near-overwhelming superiority.