"There"s a walled city in the desert to the south," said Valeria quickly, "Let"s go there!" After escaping from a terrible dragon, Valeria the Pirate and Conan the Barbarian enter the city of Xuchotl. They are looking for treasure, but find themselves in the middle of a fierce clan war. Who should Valeria and Conan trust? How can they fight the spells of witches and wizards? And what is the secret of the black pillar full of red nails?