Hermione Granger returns to the Hogwarts School of Witchraft and Wizardry, with the odd objetive of make 3 classes in a hour. Her friends Harry Potter and Ron Weasley cannot find out how she can do it, but Hermy cannot tell them as it is a secret between her and Professor MacGonnagal. As people think the Azkaban Prisoner that escaped from the prison, Sirius Black, wants to kill Harry, Hermione tries to warn him, (by other part she fights with Ron 'cause of their pets) but so much that Harry and Ron get angry with her. For several months, Hermione is alone at school, studying all time, visiting Hagrid, and of course crying. But a horrible thing that happens to Hagrid makes her and the guys become friends again. This is an amazing when the trio become teenagers. It seems like there is a thing between Ron and Hermione, Hermione buys a cat, and Ron and Harry learn to appreciate her.

Hermione's Time Turner