Only one man and one woman can stop a deadly new virus in this thrilling final volume of the series. Beautiful, brilliant Dr. Sophie Daniels was imprisoned and has escaped, but is now trapped in her San Francisco home with the only antidote to a deadly, engineered virus that destroys the brain. The virus is spreading like wildfire, turning people into violent monsters. At the same time, real fires too are breaking out all over the city. Former elite soldier Jon Ryan volunteers for the Doomsday suicide mission to rescue Sophie and the antidote. Together they must run for their lives, avoid fires and a swarm of blood-spattered monsters before they can reach Haven. For them to succeed, Sophie must place her life—and her heart—in Jon's hands. Years of combat training has prepared Jon for this moment—unafraid, nothing is too dangerous now that he's found Sophie. He will risk everything, fight anyone, for her and a future filled with hope and love.