Grace was raised to be an Angel, a herald of death by suicide bomb. But she refuses to die for the cause, and now Grace is on the run, daring to dream of freedom. In search of a border she may never reach, she travels among malevolent soldiers on a decrepit train crawling through the desert. Accompanied by the mysterious Kerr, Grace struggles to be invisible, but the fear of discovery looms large as she recalls the history and events that delivered...