Historian Alfred Kelby decides to publish the diaries of Margaret Spender, Lord Delamore's secretary and secret lover. But these diaries go beyond historical records, they are pure scandal. Before the diary can be published, Kelby makes an unsettling disappearance. Someone is out to get their hands on these potentially explosive diaries no matter what and Temple is desperate to stop them. As he digs deeper into the dark political underworld, it is up to him to find out what really happened to Lord Delamore, the statesman whose death over ten years ago has been shrouded in mystery.