AU Harrison Riddle is a genius in Potions and Transfiguration, but with his father being the Dark Lord Voldemort, having a sociopath for a twin brother, and his unhealthy obsession with experimentation, Harry expected to be isolated from the world for the rest of his life. However, that all changes when Lord Voldemort decides to send his two sons to Hogwarts as spies.

Sirius had made a slew of different decisions that night he had arrived at Godric's Hollow. With Sirius' focus on Harry rather than revenge, a very different Boy-Who-Lived is going to make his return to the wizarding world at the age of 13. But the question is, why did Harry return so late? And will he still be the Hero the Wizarding World needs? Haphne! AU-ish, slightly mature!