Walker is a D-Day veteran with post-traumatic stress disorder; he can’t return home to rural Nova Scotia, and looks instead to the city for freedom, anonymity, and repair. As he finds his way from New York to Los Angeles and San Francisco, we witness a crucial period of fracture in American history, one that also allowed film noir to flourish. The Dream had gone sour but — as those dark, classic movies made clear — the country needed outsiders to study and dramatize its new a