Veteran FBI profiler Maggie O'Dell and Assistant Director Cunningham believed the threat targeted Quantico. It targeted them.

A deadly virus—virtually undetectable until it causes death from a million internal cuts. The victims appear random, but Maggie wonders if vengeance isn't the guiding hand.

An aficionado of contemporary killers, using bits and pieces from their crimes—the Beltway Sniper's phrases, the Unabomber's clues, the Anthrax Killer's delivery.

Maggie knows dangerous minds, but she must tackle this new opponent from within a biosafety isolation ward—while waiting to see if death is already multiplying inside her body. She just fears her last case might end with the most intelligent killer she's ever faced escalating from murder…to epidemic.