When the old bloodlines stir, the world will tremble. Lieutenant Rick Becker thought the battles of Burgh Castle were behind him. But when visions of ancient battlefields and chained gods begin to haunt his dreams, he is drawn once more into the shadow war between monsters, legends, and the men sworn to stand against them. Across the sea, Director Gideon and the knights of G.R.A.I.L. uncover a dark alliance between the vampiric lord Abhartach and the secretive Ouroboros Society—an alliance seeking to resurrect the Black King Mordred of Camlann. As chains forged before Arthur’s reign begin to break, Rick must rally the Round Table reborn—Guinevere, Pendragon, Merlin, and the Wolfpack—to hold the line against an enemy older than myth. From the mist-shrouded ruins of Britain to the black waters of Avalon, the war for the soul of mankind begins again. Ancient oaths will be tested. Old gods will rise. And the line will be held… or the world will fall.