Harriet Granger is Hermione's younger sister and starting her first year at Hogwarts, instead of being placed in Gryffindor with her sister she ends up being put in a different house, one that nobody suspected she would be in. After finding the Diary of Tom Marvolo Riddle in the bathroom she becomes attatched to the book and is taken to the Chamber of Secrets along with Ginny Weasley. Can Harry and Ron save them both or will one be left behind?
7 parts