Summary
The first time Vernon strikes a 7 year old Harry Potter, the boy manages to magic himself away from home. The entire wizarding world is in disarray at the disappearance of the Boy-Who-Lived. When the news reaches Sirius Black in his cell, it's all the incentive he needs to escape from Azkaban and find his Godson...before someone else does. Powerful!Gray!Harry, Mentor!Sirius