Doorway to Eden

Separated by a century, Andrew and Abbie meet each other in a dark and fearsome world where an unending cold wind blows and nothing changes.
Devastating impediments and unimagined dangers arise as they try to navigate a realm where only the two of them exist. Is this dark Eden as cursed as the original Eden had been blessed?
Is there a doorway that leads to a brighter world, and if so, can they go through it together, or are they fated forever to exile?