Pace

A mysterious "Front," originating in Scotland and slowly expanding outward, threatens humanity's existence.  In defiance of the known laws of physics, it only kills humans and is otherwise undetectable.   Panic-stricken nations struggle against both the advancing menace and a tide of civil unrest.  Desperate individuals must find their own paths, and find them quickly.  Although very slow, the Front can be deceptively difficult to escape.  Mankind has only a few years to pool its rapidly dwindling resources and save itself from extinction.