Hogwarts Undercover

AU. Someone sinister is stalking the halls of Hogwarts School of Witchcraft & Wizardry. As the attacks mount, the Ministry sends in its best auror to work with someone on the inside. Harry works undercover along with Hermione to figure out who is putting the students under a spell that leaves them with no soul. Along with figuring out the case, a major attraction grows between the two of them, but will Harry's true life allow them to be happy together?