At the outset of this adventure, Jack Aubrey and Stephen Maturin pursue a heavy American privateer through the Great South Sea. Their ship, the Surprise, is now also a privateer, the better to escape diplomatic complications from Stephen's mission, which is to ignite the revolutionary tinder of South America. Jack will survive a desperate open-boat journey and come face to face with his illegitimate black son; Stephen, caught up in the aftermath of his failed coup, will flee for his life into the high, frozen wastes of the Andes; and Patrick O'Brian's brilliantly detailed narrative will reunite them at last in a breathtaking chase through storm seas and icebergs south of Cape Horn.