In a winter-ravaged city, Zane and his friend Selena are caught in the middle of a sudden, violent outbreak where people begin turning into savage, zombie-like creatures. As the chaos unfolds, Selena starts to change, showing signs of the same monstrous transformation. Despite Zane's efforts to protect her, she becomes increasingly uncontrollable, growing new, terrifying abilities and struggling with her humanity. In a desperate attempt to survive, Zane is forced to lock her away while seeking a cure, but when he finds her again, she has adapted to her new reality, becoming a skilled hunter. Now, Zane must navigate a world where humans are hunted by the transformed, trying to hold onto the humanity that remains in the few survivors, including Selena.