Moriarty 2

It's been three years since the name Elrod disappeared, yet everyone has been wondering where the young lady went, as if her death were a mystery. They said her body was never found. It no longer amused the public about the incident, so the people moved on from it. During this time, William and Sherlock collaborated, and MI6 was created. As the days moved on, things have been different in a sort, as if something has completely changed the day Elrod went missing. A woman appears in London, catching the attention of the public the moment she disembarks the ship. A woman who came to London for new job opportunities from Paris. She has a resumè of a detective. One would say she exudes the aura of a murderer rather than a detective. She stops by 221B Baker Street, right in front of the door of Sherlock's. Who is she? How does she know Sherlock? Most importantly, why does she looks like the woman who went missing three years ago?