Sirius y Hermione: a story across the time

Hermione makes a trip across the time because of a spell crossing and does not know if she will ever return to her time. For that reason, she begins to fight, managing to make herself little by little a name in the fight against Voldemort. But, she is only sixteen years old, so sooner she will have to go back to school, where will meet the legendary marauders and Lily