Sherlock: Carpe Diem

Everything was quiet at 221B Baker Street until a family friend of John's comes to stay, a 15 year old girl who has decided to bring 2 friends along with her. Of course they unintentionally make Sherlock's life a living hell. However, when a case opens up, and Sherlock just can't seem to solve the puzzle, will the 3 young girls be able to help him, or lead him and John towards and untimely fate? The clock is ticking...