On the night Dumbledore falls from the Astronomy Tower, Hermione Granger disappears forever. Her memories taken from her, she is sent backwards in time to September 1944. Dually claimed as the amnesiac daughter of eccentric Potioneer, Hector Dagworth-Granger, and as a new Seventh Year in the House of the Snakes, Hermione must grapple with discovering who she really is.