Looking for a fic that has Harry going back to Hogwarts quieter, more studious. He begins a relationship with Draco. Over the summer Lucius kills Draco and Dumbledore hides this from Harry. When Harry finds out he wants revenge against Lucius and Dumbledore. He eventually starts a relationship with Snape and joins Voldemort in the end.
If you know what story this is please let me know. Thanks.