Sherlock's younger sister comes back to London after twelve years. She has a deadly past that only Sherlock, Mycroft and Lestrade know about. People want her dead. But what if Watson starts to fall for his best friend's only sister. Can he take whats to come if he so chooses to let himself fall in love with her or will he crumble and leave.

(Kid!Lock) Bullied by the children at school and his older, smarter brother Mycroft, Sherlock Holmes feels nothing but alone in the world. One Christmas morning though, he receives the best gift any lonely child could ask for.