1777: the revolution in America has erupted into a full-scale war. The navy's main task is to prevent military supplies from reaching Washington's armies and to destroy the fast-growing fleet of French and American privateers. As a junior officer Bolitho is often bewildered by swiftly changing events, but in a ship of the line, under a hard and determined captain, he has little opportunity for uncertainty. At a time of shortages and sudden death even a lieutenant can find himself faced with tasks and decisions more suitably given to officers of greater experience. As the Trojan goes about her affairs the threat to Bolitho and his companions makes itself felt from New York to the Caribbean.