Read the prologue. You are Regulus Black. When Regulus Black woke up in 1991 after he was supposed to die twelve years prior, he realized two things. One, the locket he had worked so hard to steal had never been destroyed so the Dark Lord was still alive. And two, Harry Potter, James Potter's son, was in danger. OR Regulus goes to school in the same year as the Golden Trio. Once you get to the sorting hat you somehow ended up in Gryffindor Also unfortunately for you Remus is teaching and Remus is the one person other than Sirius who is in Azkaban who when he sees you he will recognise you immediately.