In this, the final Horatio Hornblower adventure, C.S. Forester throws his hero into one of the most challenging missions yet. Upon discovering highly confidential papers dispatched by Bonaparte, Hornblower sets off to enlighten the Admiralty about his game-changing, new findings. Troubled after having been informed of Pierre-Charles Villeneuve's escape into Spain, they welcome Horatio's news and send him off on a high-priority assignment that they believe will lead to England's victory over Napoleon.

Horatio Hornblower sails South American waters and comes face to face with a mad revolutionary in a novel that ripples with risk and gripping adventure. Throughout his escapades, Forester's hero remains resourceful and courageous.

Captain Jack Aubrey is ashore on half pay without a command—until Stephen Maturin arrives with secret orders for Aubrey to take a frigate to the Cape of Good Hope under a commodore's pennant, there to mount an expedition against two French-held islands. The difficulties of carrying out his orders are compounded by two of his own captains...

Her Majesty's ship Sutherland is a humdrum ship of the line. But in command is none other than the heroic Captain Hornblower and, with his crew from the Lydia, he looks set to take on commando raids, hurricanes at sea, and Napoleons's gun batteries.

Napoleon is about to invade England, and it falls to young Horatio Hornblower to stop him.