Thomas has faced impossible odds since becoming Excalibur's captain. His greatest challenge still lies ahead. The line between hope and destruction has never been thinner. When an unexpected ally brings Thomas and his battle-worn crew back from the brink of defeat, they find themselves racing against time, desperate to return to the fight before the Draconite can strike a final, devastating blow. Meanwhile, the threat to Avalon continues to evolve. Armed with an ancient and terrible power, Turquine plans to bring the galaxy to its knees. Not in Morgana’s name, but in his own. Two dragons will rise, but one must fall.