Even after nearly two decades together, the Desplaines have their secrets. Oliver, an aging Wichita entrepreneur, is on his third marriage, and has recently found an even younger mistress. Catherine, his seemingly content wife, has a more colorful past than her husband knows, and it's about to come rushing back when Catherine learns she's been named guardian of a teenage girl she's never met. Meanwhile, the Wichita media is buzzing with the reemergence of a serial killer who haunted Catherine's own adolescence; a murderer has been hiding in plain sight, raising questions of how little any of us can truly know of our neighbors, our loved ones, or ourselves.