Everyone has heard of Sherlock Holmes. Fewer know of Mycroft, the older brother. A very, very few scholars have speculated about a third Holmes boy, Sherrinford. But Morrigan Holmes was lost to history, and that was exactly the way she wanted it. Now her memoirs have been discovered, shedding light on a different side of the Holmes family - a side steeped in bad blood, resentment, and long-kept secrets. In this final instalment of the first serialized adventure of Morrigan Holmes, a friend is discovered too late, a reckless step is taken, and the jaws of London snap shut on our unfortunate heroes.