For two thousand years, the continent of Riviand has rested beneath the ocean, protected by the Blade of the Phoenix-a magical sword that keeps its people safe. When the blade is stolen, Queen Claret must strike a desperate bargain with the goblins to prevent a catastrophic flood.Meanwhile, on Earth, Kaylee and Mateo stumble upon a mysterious sword near their school. Unbeknownst to them, it's the key to an ancient magic-and the fate of a submerged world. Drawn into the fantastical land of goblins, giants, and trolls, they must navigate treacherous alliances and unravel the truth about the blade's power.Can Kaylee and Mateo restore balance to Riviand, or will their journey doom the world they've just begun to understand?