It is a fallacy- incidentally a very common one- to suppose that genetically inherited traits are by definition fixed and unmodifiable. My name is Tom Marvolo Riddle. I am not my father. I am not Voldemort. This is my story.
Sirius Black died that day. There is nothing to doubt about it, he went through the Veil. That's been established as a fact. However, a few coincidences and some sheer dumb luck- with the aid of some interesting individuals- gives him another chance. A chance to change the outcome of the war, maybe even prevent it altogether! No pairing as of yet, Rated T for language and themes 3