Boiled Over - Sherlock

Jim Moriarty leaves Sherlock all the answers to mysteries past present and future in the form of a 16 year old girl named Kathryn. Kathryn was kidnapped from her foster family (who was later killed, convenient, right?) two years prior by Moriarty for the sole purpose of playing with Sherlock. He wiped her memory completely and programmed triggers into her, making her vital to solving sherlock's cases. Sherlock and John become her legal guardians and she becomes and irreplaceable character in the baker street family but what if good ol Jim put something else in Kathryn... Something sinister.

I don't own Sherlock or the accompanying characters, they belong to bbc. I do, however own Kathryn, her parents and her story.