Washington, DC: Twin brothers are found drowned in a Perspex box, one gagged and strapped to a chair. It's the latest in a series of cruel and elaborate murders with two things in common: the killer has left a family history chart at each crime scene, and the victims all have a connection to genealogical sleuth Jefferson Tayte. Hoping his insight and expertise will help solve the case, the FBI summon Tayte back to the capital. But as he struggles...