Harry thought that nothing could shock him anymore, but when two wizards come from the future saying they want to change it, bringing back people from the past, along with Harry and company in order to change their destiny...well, let's just say that he was wrong, very wrong.
Harry hoped that his third year would be calm, of course, with a murderer on the loose wanting kill him, dementors all around Hogwarts, a new DADA professor and a whole web of secrets around him and his friends he was quickly losing all hope