A man framed for the murder of his best friend seeks revenge against the four men who put him in Belmarsh prison, the highest-security jail in the land, from where no inmate has ever escaped.

"London, 1988. Royal fever sweeps the nation as Britain falls in love with the 'people's princess.' Which means for Scotland Yard, the focus is on the elite Royalty Protection Command, and its commanding officer. Entrusted with protecting the most famous family on earth, they quite simply have to be the best. A weak link could spell disaster. Detective Chief Inspector William Warwick and his Scotland Yard squad are sent in to investigate the team....

"Impenetrable. Well protected. Secure. Home to the most valuable jewels on earth. But once a year, when the Queen attends the State Opening of Parliament, the Metropolitan Police must execute the most secret operation in their armory as they transport the Crown Jewels across London. For decades, the elite squad at Scotland Yard have been in charge of the operation. And for decades, it's run like clockwork. But this year, everything is about to change....