After a brilliant Korean chess prodigy creates a groundbreaking system that can predict human behavior from visual cues and body language, he and his wife are found dead in an apparent murder-suicide. The following investigation will throw grizzled Vietnam veteran Vincent and his orphaned niece, Claire, into a dangerous hunt for a killer with no boundaries - a killer caught in the throes of a disturbing, psychopathic fever dream. From the award-winning author of the Arcadia series.