Nathaniel Drinkwater's life at sea begins with the HMS Cyclops' capture of the Santa Teresa during Admiral Rodney's dramatic Moonlight Battle of 1780. Subsequently, Drinkwater's courage and initiative are put to the test as the Cyclops pursues American privateers threatening British trade and is later dispatched to the swamps of South Carolina, where many lives are lost both at sea and ashore. Gradually, Drinkwater matures into a capable and self-assured sailor. As he contends with enemy forces, the tyranny of the Cyclops' midshipmen, and the stark contrast between the comfort of home life and the brutality of naval service, he finds strength and sustenance in the love of his beloved Elizabeth.