Former nurse practitioner and all-around spitfire, Georgianna Harris is carving out a meek and fragile existence in the ruins of the Twin Cities after the world ended in a solar storm, burning the sky and frying the grid. Now, all of humanity is clawing its way through the dark, while Georgianna trades medicine for survival. Deciding who gets to live and who doesn't is a burden she's forced to endure as mercy is a luxury she simply cannot afford. But when he appears, everything changes... Bloodied, broken, and impossibly familiar, David Andrews, a nameless John Doe in a hospital bed before the blackout, is awake, battle-scarred, and just as lost in this new world as she is. Their uneasy alliance is built on necessity, but the heat between them is something far more dangerous. With winter closing in and factions at war, George's family is in danger and caught in the crossfire. David's past is creeping in like a shadow, threatening more peril than ever before. In a world where love is a risk and survival is never guaranteed, they have a choice: trust each other, or let the darkness win. Will they be the last light of home for each other?