After four years of life in a post-apocalyptic world, the one thing that both Mike and Sarah know for sure is that nothing ever stays the same. Just when life has begun to settle down, a threat comes at them from a totally unexpected source.Not England, nor the US, not rampaging gypsies or even the Middle East. This time it's the land itself—the very bushes and trees of Ireland that they'll have to protect themselves from.Could the bomb have opened an ancient portal long kept shut? Could there really be fairies and mystical beings running through the woods? Or is the evil that's creeping out of that portal something very, very human?