When Ciel wakes up one morning h is expecting to have a normal day, but when Sebastian announces that he is going to be meeting Lady Elizabeth, he is suddenly scared, who is this girl with her and why does she look like an angel.

Sebastian and Ciel come upon a homeless girl, Esme, who turns out to be demon. Ciel brings her back to the estate and ends up allowing her to stay. Esme, on the other hand, doesn't want to remain at the Phantomhive manor because of her own problems and when she gets involved with the demonic butler things begin to spiral out of control for both of them. Sebastian X OC