In the middle of the night Sherlock suddenly shows up at Sally´s doorstep, where he confesses that he has finally done what she always had expected: kill someone. It turns out that he has killed in a particular gruesome way and precedes to show the clues etc. to the Yarders. He is put in jail and everyone including the shocked Mycroft turns away from him.

But Sally cant shake the feeling that something is wrong. Everything was too easy. Sherlock was too complying etc. And she is right: someone influential set him up and told Sherlock that he needed to make sure that everyone ( John, Mycroft, Mrs. Hudson, Molly, Lestrade,Mike, even Anderson and Sally) turned away from him. Because if anyone stayed at his side, they would have been killed. Cue him freaking out when Sally starts asking questions and do everything he can manage that she stops being friendly to him for once.
But of course Sally wont give up that easily. She feels that there´s something wrong here.

Extra bonus: Let Sally be extra mean to Sherlock, when they confront the person- but its just for show, as she has seen through him.

( sorta a reprompt from an older part)