Black Butler 2 is the sequel to the original Black Butler anime. The story follows the continuing adventures of Ciel Phantomhive, the young head of the Phantomhive family, and his demonic butler, Sebastian Michaelis. The two of them must investigate various mysteries and crimes while also dealing with the politics of the noble class. As they work to unravel the truth behind each case, they also uncover secrets from Ciel's past that could threaten his very existence.