In the Pirates series, pirate Myles Hunter and his crew are the best monster hunters of the seven seas! Pirate princess Rohanna Razor-Tide seeks their help after the emergence of a new threat in the pirate world. The Deepers, sea monsters that resemble humans, have discovered the island of the Crystal Skull and have unleashed powerful underwater monsters. Can Myles Hunter and his crew stop Dark Kraken, the leader of the Deepers, and defeat the sea monsters?