Miss Charlotte Pettifer belongs to a secret society skilled in a very particular art. That is to say - although it mustn't be said too loudly - witchcraft. But when rumours of a long-lost amulet with very special powers start to circulate, Charlotte is determined to discover the truth. Together with the dastardly pirate, Alex O'Riley, Charlotte sets out to find this treasure and bring it back to the Society. But might she also find love along the way?