There is no war in the northlands, just annihilation. Either the dragons will destroy this world or Queen Beulah will raze it to the ground.Below the city is a secret the House of Balwen have kept for millennia, a treasure beyond counting. None but a direct descendent of Balwen himself can open the escape routes from this cavern. To do so Iolwen will need to claim the Obsidian Throne.Meanwhile Errol and Sir Benfro find their destinies drawing closer together, with the future of all life in the Twin Kingdoms resting in the hands of these two unlikely heroes. There will be self-sacrifice and terrible betrayals. And the lives of boy and dragon will be forever changed.