Mercy, Idaho: A small town in the hills with more than its fair share of secrets. A winged-terror that haunts the woods; an irresistible pull on the desperate and the suicidal; and now a stranger on a low-slung chopper, with fire in his eyes. For Johnny Blaze - searching for a way to wage war against heaven itself - the frozen forests of Mercy might just provide a path through the Pearly Gates...