Fresh from duty on the firgate Desperate in her fight with the French Capricieuse off St. Kitts, Midshipman Alan Lewrie passes his examination board for lieutenancy and finds himself commissioned first officer of the brig o'war Shrike. There's time for some dalliance with the fair sex, and then Lieutenant Lewrie must be off to patrol the North American coast and attempt to bring the Muskogees and Seminoles onto the Bridish side against the American rebels.