In Victorian-era London, on the night of Ciel Phantomhive's tenth birthday a fire destroyed his manor and killed both of his parents. In a moment of death Ciel strikes a deal with a demon. This demon becomes his butler, to protect and serve Ciel until the deal has been completed. After Ciel returns with his new butler. Ciel is now the head of the Phantomhive corporation, handling all business affairs as well as the work as the Queen of England’s guard dog and looking for his parents murderers.