After a century of Sleep, Tynan Llywelyn has awoken to find the world he once knew utterly obliterated by a brutal war of epic proportions. In a new apocalyptic society, bitterly divided by magic and technology, the Tyst Empire has found that a hundred years of global domination is not enough to sate their thirst for power. They have discovered the secret of the vampire race and have designed a plan to seize their own sinister form of immortality with the help of an ancient vampiric god. The Phuree, a rebel uprising that has been engaged in a bloody war with the Tyst since the beginning of the new regime, have obtained the knowledge of Lord Cardone's plans and have allied themselves with the remaining Immortal clan. The powerful Phuree oracle, Nahalo, has had a vision that in Tynan alone lies the power to defeat the vampiric god and the dictatorship. Cast into the midst of a global war between magic and technology, mortals and vampires, in a new world he is still struggling to define, Tynan must make the harrowing decision to save the world he so bitterly detests or stand and watch as humanity is destroyed by a primordial evil beyond all imagining.

In the year 2111 Tynan Llywelyn, the forsaken philosophical leader of the Immortal vampire race, awoke after a century's Sleep to a world decimated by war. Drawn into a new societal structure bitterly divided between ancient magic and a cruel new technology known as the Chronous, Tynan has found himself at the heart of an epic battle to bring down the Tyst Empire, a merciless international dictatorship. The Tyst crave more than global domination; they desire true Immortality and have made a pact with an ancient vampiric god called the Vicinus who has promised them eternal life in exchange for freeing him from his otherworldly prison. Tynan would have liked nothing more than to simply turn his back on the war, but his vampire Elders and the Phuree, a cunning human rebel uprising, had other plans in store for him. He was not only to join in the fight, but he was to be the vampire to take down the Tyst Empire and bring the Vicinus to his knees. A year later, struggling against the ironclad orders of his Elders and his own vicious moral demons, Tynan has relented and agreed to complete the mission the Phuree and Immortals have devised for him. Amidst a crumbling Immortal legacy and a divided human world suffocating from fear and bloodshed, he will lead the way towards the front lines of a war against a colossal empire he has barely begun to comprehend and a primordial force hell-bent on destroying the world. Tynan can only pray now that the Immortals and Phuree have chosen in him wisely.

When Tynan Llywelyn awoke from a century of Immortal Sleep in the year 2111 his Maker, Phelan Daray, delivered him by force into the arms of a war between the Tyst Empire, a global technological dictatorship bent on becoming immortal by resurrecting a vampiric god called the Vicinus and the Phuree, the human rebel uprising. Without a chance to fully adapt to the dangerous war-torn world around him, Tynan was forced to make a horrific choice to either stand and fight against the Tyst Empire, carrying out a mission to assassinate the Queen bearing the vampiric god, or turn his back on the world, leaving it to the mercy of the Tyst’s greed and the Vicinus’ revenge. Against his better judgment, he chose to fight. Now, with the rage of a thwarted empire and a denied primal god bearing down upon him, Tynan must make his final stand, risking everything to save not only his own vampiric race, but humanity as well. The eagerly-anticipated conclusion to Gabrielle S. Faust’s Eternal Vigilance trilogy.