In the wake of a humbling incident aboard a canal boat in the Cotswolds, young Captain Horatio Hornblower arrives in London to take command of the Atropos, a 22-gun sloop barely large enough to require a captain. Her first assignment under Hornblower's command is as flagship for the funeral procession of Lord Nelson.

In this new adventure, Hornblower is overjoyed to discover his next task is to serve aboard the mighty HMS Renown. After witnessing some unsettling scenes however, he soon finds himself struggling to serve under the captain, James Sawyer, whose unsound mind leads him to treat his crew with extreme suspicion and contempt.

Having received strict and confidential orders from high above, C.S. Forester's inimitable hero must recapture The Flame, a brig which has been taken over by a band of mutineers. Voyaging to the Bay of Seine in order to rescue the captive Lieutenant Augustin Chadwick from his disloyal crew, Horatio Hornblower must once more fight for the freedom and safety of his people and country.

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.