The Disease

Scarlett Everest: one of the last survivors of Aeterna Putredine, a disease that turns its victims into flesh-eating zombies. Penny Everest: Scarlett's six yearold sister who was flown off on a plane, away from the fast spreading disease.
The Empire State Building: a plane will arrive there in a month and a half, picking up any remaining survivors.
The Plane: Scarlett's last hope for survival.