Will this be Alex's final night? Danger from the vampires below. Turmoil in the city above. Nowhere is safe and every day is a battle.After being left for dead on the surface, Alex and the GMT are itching to take down the man who sabotaged their mission. Little do they know, an even more pressing threat is waiting just outside their door.. With treachery in the skies and a blood-thirsty army on the surface, Alex and her friends have nowhere to run...