A sinking British ship, her crew and passengers-men and women alike-ruthlessly murdered at the hands of a French privateer. This is the nightmare Ramage and the crew of the Calypso stumble upon while engaged in a sweep for freebooters in the waters off Jamaica. Supported by his men in a thirst for righteous vengeance, Ramage sets sail to bring the murderers to justice.

The youngest captain in His Majesty's Navy, with a reputation for landing impossible assignments, Lord Ramage is dispatched to the Caribbean islands of Martinique and Diamond Rock. The mission seems humdrum: barricade the French within Fort Royal. But sent to sea in the Juno with a crew grown restless and undisciplined under the prior command of a drunk, Ramage realizes his vessel may not be up to battle with the French.

The West Indian bases are desperate: post vessels-a vital communications link between England and the West Indies in the war against France-are mysteriously disappearing and no packets have arrived with orders in months. Were the privateers out in full force again? Had Napoleon's navy a secret new weapon? Lieutenant Lord Nicholas Ramage sets out from Jamaica to discover what treachery is threatening to throw the British navy into chaos.

The lieutenant is ordered to proceed to Gibraltar "with all possible dispatch" aboard His Majesty's ship Kathleen, to support Lord Nelson in a battle with the Spanish off Cape Trafalgar.