Still longing for adventure, Princess Helen of Sparta maintains her disguise as a boy to join her unsuspecting brothers as part of the crew of the Argo, the ship commanded by Prince Jason in his quest for the Golden Fleece.
In 1722, after arriving in Jamaica where she is to be married off, sixteen-year-old Nancy Kington escapes with her slave friend, Minerva Sharpe, and together they become pirates traveling the world in search of treasure.