Baker Street will never be the same when Lexi MacKenna walks into the lives of Sherlock Holmes and John Watson. Sherlock, a difficult man and consulting detective who gave up caring, John, an ex- army doctor who misses the battlefield, and Lexi, an Irish girl on a mission who will end up rescuing them from their worst enemies, themselves. Begins in ASiP. Eventual Sherlock/OC.

Down on her luck Darcy Ray thought her life couldn't get any worse. She was wrong. Her new boss hates her she's been evicted and then she somehow gets embroiled along with an ex-army doctor in a murder investigation. All she wanted was a flat-share but didn't expect an eccentric genius of a man for a roommate. Maybe her luck is beginning to turn around. Sherlock/OC