The Thorpes were the perfect couple: young, attractive, and ideally matched. But the veil of perfection can mask many secrets. When the Thorpes are found dead in their tasteful Flagstaff living room after having committed double suicide, alarms go off in the executive offices of Eden, Incorporated, the worldwide matchmaking phenomenon that uses its astonishing artificial intelligence and surveillance tools to bring together perfectly matched supercouples. Eden guarantees its customers just one thing: lifelong happiness. Enter Christopher Lash, a gifted former FBI forensic psychologist who is brought in by Eden to perform a quick--and quiet--investigation.