Ghost of a Chance

Having no body means nobody can hurt you, right?
The ghost of Horace Lancaster has been protecting Bianca Brighton ever since she nearly died and became a Medium. Now they are partners, best friends, and Horace would do anything to protect her.
Professor Watkins is comatose, and only Bianca knows he's magically blocked from returning to his body. The other local Medium isn't investigating, and Bianca doesn't have time to ask why; the Professor is the only credible witness to a heinous crime.
With a court date right before Fall Mid-Terms, Bianca and Horace must get Professor Watkins back in his comatose body and on the witness stand ASAP. Can they do it in time with Gatto Gangsters and a powerful magus trying to stop them?