The cardinal rule of espionage: Never look back.KGB agent "Dragonfly" knows it. A master of disguise, he's the ultimate terrorist, leaving headlines in his bloody path. Andrew Clayton forgot it. For eighteen inactive months, the hardnosed Security Intelligence agent has blamed himself for his brother's death at Dragonfly's hands. But now Dragonfly has surfaced in Canada, and Clayton knows he's got one last shot at revenge. What Clayton doesn't know is that Dragonfly is armed with the supreme biological weapon, set to release its toxic devastation should his mission be compromised. Stopping Dragonfly without triggering a major disaster will be deadly-if not impossible. But for Andrew Clayton, it's something that must be done...