A classic pirate tale of the Spanish Main, featuring the female pirate, Captain Jo, this continuation of "Black Bartelmy's Treasure" picks up the plot three years later. The 2 books together tell the adventure of Martin Conisby who had all stole from him by an adversary of a longstanding family feud and Martin was set on revenge. In attempts to get travel over-sea to his revenge becomes involved in a treasure hunt, stranded on deserted islands, and involved with pirates and other foes.