Hermione Granger and the Magic Blue Box

Hermione Granger is wandering London, unsure what to do with herself in the summer before she starts 5th year. She hears a strange wheezing, groaning noise, and follows it. She meets the Doctor, who is looking for Clara Oswald, the impossible girl who died twice. Hermione agrees to travel with him and help him search, forming an unlikely friendship with another Hogwarts student along the way.
Rights to J.K. Rowling and the BBC respectively.