In the Soviet hills of Dushanbe near the Afghanistan border, an otherworldly array of pillars and domes rises into the night. Between the USA and the Soviet Union, no contest is more urgent than the race to build the first missile defense system, and no one knows that more than the two men charged with assessing the Soviet's capabilities: Colonel Mikhail Filitov of the Soviet Union, an old-line warrior distrusted by the army's new inner circle of technocrats, and CIA analyst Jack Ryan, hero of the Red October affair. Each must use all his craft to arrive at the truth, but Filitov gets there first?

At what point does criminal activity threaten national security? When can a nation respond to it as to an enemy? These are the questions Jack Ryan must consider when he hears the awful news: Colombian drug lords, tired of being harassed by US law enforcement agents, have assassinated three high American officials, and that is just the beginning. The message is clear: Leave us alone. But they have pushed too far. Someone steps quietly over the line they have drawn, deploying covert-action teams in Colombia, intending to take the fight to the enemy.

Whether hunting warlords in Japan, druglords in Colombia, or nuclear terrorists in the United States, John Clark is efficient and deadly ? but even he has ghosts in his past, demons that must be exorcised. And nothing is more demonic than the peril he must face as the commander of a covert multi-national anti-terrorism squad known as Rainbow. Almost as soon as the group is formed, three terrorist attacks occur that seem unrelated at first, but may be the beginning of a new brand of terrorism like nothing the world has ever encountered before.

Peace may finally be at hand in the Middle East - as Deputy Director of the CIA Jack Ryan lays the groundwork for a peace plan that could end centuries of conflict. But ruthless terrorists have a final, desperate card to play: they have their hands on a nuclear weapon and have placed it on American soil in the midst of an escalation in tension with the Soviet Union. The terrorists hope to rekindle cold war animosity and prevent reconciliation between Israelis and Palestinians.

On a crowded tourist beach in Portugal, US operatives use a high-tech drone to watch a French arms dealer flirt with a beautiful woman. It's only when she leaves that they realise she has shot him dead. In Iran, protests are growing against the oppressive regime, whipped up by a charismatic student. Most external observers are excited, but on the ground a spy of questionable loyalty senses something is badly amiss.