Miss Charlotte Pettifer belongs to a secret league of women skilled in the subtle arts. That is to say - although it must never be said - witchcraft. The League of Gentlewomen Witches strives to improve the world in small ways. When the long lost amulet of Black Beryl is discovered, it is up to Charlotte, as the future leader of the League, to make sure the powerful talisman does not fall into the wrong hands. Therefore, it is most unfortunate when she crosses paths with Alex O'Riley, a pirate who is no Mr. Darcy.