All that ends well is well

Summary: On the night of Halloween of 1981, Lily Potter decided that her job wasn't done and returns as a ghost. Ten years later, Quirrell has a plan that involves a sorting hat and Mr Harry Potter. Many suffer the consequence of this plan. Lucius Malfoy becomes the instigator and target of various revenge plots. And these, of course, involved his son Draco Malfoy.