The computer says the USSR will attack the USA. The computer lies.
On Sunday, the 6th of June, a red alert will be sounded. There will be no war. Only a victory. And, unless the November Man can change history, it will belong to the enemy.
An undercover mission is blown. The corpses of three U.S. secret agents lie unclaimed in Europe. Baffled and angry, unable to trust its own people or its own computer, American Intelligence must go outside...

Devereaux, an agent for R Section assigned to spy on spies, is sent to England, where he discovers an IRA plot to murder a member of the British Royal Family.