The year is 1777, and as the American Revolution rages on the mainland, the British Navy prepares for action at sea. Against a growing fleet of American and French privateers, the navy must maintain its blockade of Washington's vital military supplies.

Caught up in the turmoil, Richard Bolitho, a young lieutenant aboard the Trojan, finds himself having to make momentous decisions in the heat of battle - decisions that could affect the lives of many men and, perhaps, the fate of nations.