Surviving the sun flares was easy for Mark and Trina compared to what came next. Now a disease of rage and lunacy races across the eastern United States, and there’s something suspicious about its origin. Worse yet, it’s mutating, and all evidence suggests that it will bring humanity to its knees. Mark and Trina are convinced there’s a way to save those left living from descending into madness. And they’re determined to find it --- if they can stay alive.