After the police catch an intruder and Battle finds two bullets, Bundle makes a shocking discovery. Can she finally uncover the mastermind behind it all?

Bundle's desperate search for the killer takes her from London's seedy underbelly to a country house gathering which could change the course of history.

A lavish party at the Caterham estate results in sore heads the next day — and one guest not waking up at all. Grief pushes Bundle to search for answers.