Keal, a young pirate haunted by his past, and Luna, a restless mapmaker searching for adventure, are forced into an uneasy alliance. Together, they sail through treacherous seas, ancient ruins, and deadly beasts in search of The Heart of The Sea-a mythical artifact said to control the winds and tides. But as rival Pirates close in and emotions rise between them they must decide if they can trust each other.. or lose everything to the storm on the horizon.