An American writer in London

Rain Davis is an American writer teaching at a London university. Sherlock Holmes is a famous consulting detective. Rain hires him to help investigate a family connection to a historical crime syndicate only known as M. When a secret journal is brought to light can Sherlock and his trusted companion John Watson keep Rain safe from those who want the past to stay hidden or will Rain fall in London?

When you're a stranger in a strange place who can you trust?