Robert Gibson's murder looks like a previous crime scene that drove Joe Donovan to a breakdown. One detail stands out in the room, "Donovan", printed on the wall in blood.
There is another copycat murder with "Donovan" scrawled on the wall. Joe Donovan scrambles to prove his innocence, but how close is he to the real killer?
Now back as senior scientist in the Forensic Investigations Unit, Donovan doggedly pursues a serial killer who takes pretty blonde women as his victims. He thinks he knows not only the killer, but also the next target--Sharon Page, a pub owner looking for more from Donovan than merely protection.
When wealthy Stephen Parker is found shot through the chin in his swanky home, it seems like a robbery gone wrong. The evidence points to John Pinion, a self-proclaimed "investment advisor" to whom Parker owed 8000. But Donovan suspects the victim's son, who seems unnaturally close to his mother.
The entire FIU team rushes to a secluded air force base, where a cargo plane has landed with all of its passengers and crew stricken by an unknown illness. Authorities believe it's biological terrorism. But Donovan focuses his attention on the plane's mysterious human cargo--an unnamed, blindfolded prisoner.