Every hero needs a weakness. Peter Ash has been traumatized by his multiple tours in Iraq and Afghanistan. Enclosed spaces rattle him with a sort of debilitating white noise. On return from duty he lives in open spaces. But when one of his soldiers commits suicide he approaches his widow to do what he can to help. But then he learns more about his friend's life and the origins of the mystery of what he finds under her crumbling porch. The story has a great pace and has one of the best conclusions I have read. I found myself liking Peter more and more and cheering him on as he deals with PTSD and faces terrifying obstacles.