Clayton Stone's ordinary middle-school life gets turned upside down when he discovers that his grandmother is the head of the Special Service, a top-secret government organization specializing in undercover work. His family's diner turns out to be a cover for an extensive underground office filled with top-of-the-line gadgets and weapons. Clayton is stunned, and the real shock sets in when he learns that the Special Service wants to recruit him as a decoy in a kidnapping sting! It's exciting at first-- elaborate disguises and classified debriefings-- but there is real danger, too. The operation comes to a dramatic close as Clayton displays extraordinary courage in the name of duty, cementing his place in the Stone family's tradition of service.