Healing Hermione

Something awful happened to Hermione Granger at the end of the war against Voldemort, and now she's broken. Will returning to Hogwarts as an apprentice help fix her? What will it take to heal Hermione, and in the process will Severus Snape find healing himself? A very AU story that is in no way canon compliant, both Dumbledore and Snape survived the war.