In London, the Metropolitan Police have set up a new Unsolved Murders Unit - a cold case squad - to catch the criminals nobody else can. Four victims. Four cases. All killers poised to strike again. In Geneva, millionaire art collector Miles Faulkner, convicted of forgery and theft, was pronounced dead two months ago. So why is his unscrupulous lawyer still representing a dead client? And who is the mysterious man his widow is planning to marry? On...

"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....