Two young Americans have been sent to prison for selling sensitive US intelligence files to Russia.

How did these ordinary men access these top-secret files?

Larry Holtz is a prisoner intrigued by his fellow inmates' story, but when he gets involved in a plot to help them escape, he realizes just how far out of his depth he is...Welcome to a world where the truth is hidden in files marked Classified!

This electrifying series gives a unique insight into the most intriguing mysteries of modern history.

First read the spine-tingling stories, then the fact-filled case files.

Fact or fiction? You decide.