Young Tom Riddle

Harry Potter, Master of Death, is unexpectedly thrown back in time to 1938 and hired as the new Defense Against the Dark Arts teacher at Hogwarts, arriving just as a fifth-year Tom Riddle begins his ascent to power.

When Hermione's time magic experiment goes wrong in the Harry Potter universe, she becomes unstuck in time and must prevent a temporal catastrophe before she erases herself from existence.