Sirius had spent the last two years of his life couped up like a chicken in Azkaban. Maybe he was a chicken, if he didn't resign as secret keeper then his two best friends would be alive and his godson would have parents. Just as Sirius was getting sick and tired fo being useless, someone shows him a way out, legally.

What if Tom Riddle had a twin sister? Join Tom and Violet on their times at Hogwarts.