Time can be and will be re-written

The battle was lost. All Hermione had once cared about was either gone or dead. But she was not, and in their memory, she leads the resistance. Like a true Pheonix, she and her followers rose from the ashes of Hogwarts to fight back. And for years they did, until one day they came across a book. Filled with old magic. Forbidden magic. Time magic.