Souls don't always live just once. They can return, typically in a time of crisis, if they are deemed worthy. This is about two such souls. Separated by houses. Will they find each other again? Will they even know? One Gryffindor, one Slytherin.

When Sherlock runs into a girl in the street, his life begins to change as he offers the teenage girl a place to live in his home and discovers that she may be a female version of him.