The Forgotten Hero

AU. When Voldemort attacked the Potters on that fateful night, Sirius made a different decision. The decision to take Harry and run. Seventeen Years Later. Voldemort finds himself in a position of power and Dumbledore is increasingly driven into the corner. But there is an unknown factor in this tug of war. A masked man that no one knows about. A Harry never went to Hogwarts story.