Julian Slade wakes on the eve of the apocalypse, returned to a time before the Cambrian Era. Once betrayed and murdered by the woman he trusted, he now has the chance to change everything. While the world collapses under freezing temperatures and violent upheaval, Julian moves with unusual certainty, as if he already knows what lies ahead. Using his knowledge of the coming disaster and his own wit, he climbs from nothing to the title of City Lord.