H E R M I O N E is on the 'light side' and she is captured, trying to save the entire wizarding world and she is subjected to unimaginable pain. The only two people that know she is there, are locked up in the dungeon beneath her and are no help.
D R A C O is on the opposite side but is seeing how wrong he was. There is an opportunity to help the other side but no matter which side he may face dire consequences. He has to choose between doing what is right, and what is slightly easier.
But sometimes a Certain Darkness is Needed to See the Stars.