Second Chance at Saving Them {Harry Potter}

Just when life has calmed down and the last of the next generation has left for Hogwarts; Harry, Ginny, Ron, and Hermione are thrown back in time overnight. They wake up looking like they did in 1991 while keeping the memories of their lives, lives they now have to live all over again. They meet some old friends along the way; ones that they plan to save, and others they plan to put away. The only question is: Can they do all this without raising suspicions? (Blanket disclaimer- All characters belong to J.K. Rowling, and I do not claim any right to them.)