Europe is isolated. Casualties are counted by the millions and North America seems to be devastated. The impact of the meteors triggers a glaciation, thus altering completely the planet's climate.
The campaign sets in a frozen world, in which eight people (each one with its own problems and interests) join in a sort of temporary alliance, to find one particular person: Dr Margaret Blythe. On the trail of her whereabouts, they will travel and fight shoulder to shoulder, and they inevitably get to know the others. Depending on some strategic and personal decisions, you will guide this characters right to one of three possible endings.