In Victorian era London, the butler Sebastian Michaelis takes care of his 12 year old master, Ciel Phantomhive. Ciel is the earl of the aristocratic Phantomhive family, which is well-known in England for be the Queen's Guarddogs. Ciel's parents were killed in arson when he was 10 years old. He made a deal with a demon (which is in fact his butler Sebastian) to help him get revenge on his enemies. The demon butler can have his soul in return.