It was the dead who groaned within

When Abigail Runcorn, a young student at Hogwarts Catholic School for Girls and Boys, is found dead at the bottom of a tower, strange events begin to occur in the night. Hermione Granger, the night librarian, is forced to shed everything she believes in to investigate, and what she finds will irremediably alter her life. / 1970s Muggle AU / Paranormal