Sakura has fallen into the depths of the demon world. They want her abilities to remove another demon, the mission: To KILL Sebastian! She is then driven into the human world and is to work as a maid in the Phantomhive mansion. She spies on Sebastian, (the demon butler) hoping to find a weakness. They had warn her not to get too close...but what happens when her feelings get the best of her? What is Sebastian's weakness and just who is Sakura???