Sharlen Down hasn't seen much of the world in her lonely 16 years of life. In fact, she's hardly been allowed to leave the house. Now, after a rigorous practical examination by the school board, her Master is finally allowing her to enter Hogwarts School of Witchcraft and Wizardy in the sixth year. Ready to finally enter the magical world, she has one directive: Help Harry Potter.

A new student enters Hogwarts in the Trio's sixth year, laden with secrets and strange behaviors. The teachers are wary, and her interests are singular; her one directive is her only concern as she navigates the daily life of Hogwarts.