In London, the Metropolitan Police set up a new Unsolved Murders Unit—a cold case squad—to catch the criminals nobody else can. 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? On a luxury liner en route to New York, the battle for power within a wealthy dynasty is about to turn to murder. And at the heart of all three investigations are Detective Chief Inspector William Warwick, rising star of the department, and ex-undercover agent Ross Hogan, brought in from the cold. But can they catch the killers before it’s too late?