It began as a treasure hunt and ended in a fight for their lives. In the cove of an isolated island, an armada gathers. Hundreds of pirates, once enemies, have made a truce and joined as one for a common goal: to crush the powerful army of a king, to topple his kingdom, and to confiscate all the treasure within its walls. Rachel Caine and her husband Morgan thought they were sailing for buried treasure. Instead, they found themselves caught in a web of intrigue, deceit, and danger. A war is brewing on the Great Eastern Sea, threatening all in its path, and in order to stop it, they may need to seek the help of a woman from Morgan's past; the infamous pirate captain, Calypso Cruz. Together, Rachel and her companions will face the forces of evil, from duels on land to a fiery battle at sea, where victory is the only option.