NYPD homicide detective John Corey has moved to Long Island, restlessly recuperating from wounds received in the line of duty when he's hired to consult on the murder of Tom and Judy Gordon, biologists who worked on Plum Island, the site of animal disease research for the Department of Agriculture. Were the Gordons murdered because they'd stolen some valuable new vaccine, or even a dreaded virus? They'd obviously outspent their income. Had they been...