Opportunity knocks when Irina Kolodenkova, a young Russian spy, stumbles across a top-secret technology called Whirlwind, the most important military breakthrough since the atomic bomb. Charlie's the only one with the very special skills needed to track her down and retrieve it. The desk jockeys who betrayed Charlie have no choice: they have to put him back on the job. But Charlie already knows too much. Once he recovers Whirlwind, his enemies plan to betray him again -- this time for keeps.