Scars of a Survivor

She is the lone survivor of the Second Wizarding War; once she decides to embark on the journey into the perilous past, there is no going back. She decides not only to save lives, but souls, too. However, not everyone would be so welcoming to her intrusion, especially since she is Lady Slytherin. Will she be able to save the past and stay alive? FEM!POTTER & DARK FEM!POTTER. ANGST!