The Potter Twins and the Prisoner of Azkaban

Olivia Potter, her brother and their friends are back at their third year of Hogwarts, and everything is changing. Olivia past trauma has left her shaken to the core, and it only seems to be getting worse. But new danger is coming their way in the form of spectral dog, that promises nothing but danger abs harm. The mass murderer Sirius Black looms in the background, dangerous and insane.