When Bobby Kincaid is walking the slackline—a narrow, flat webbed rope stretched between two anchor points—he offers a silent gift of beauty to the air and sky.  Making peace with the world is one reason he's drawn to the seastacks off Scotland's Orkney Islands.  Colin Rose, the Olympic skier who pushed Bobby away after a horrific accident two years earlier, is another.  But Bobby and Colin will each need to heal before they can return to that space between earth and heaven where they both can fly.