The opening of Kuroshitsuji II introduces us to Alois Trancy, the young heir to the Trancy earldom. Despite his current life of luxury, his earlier years were fraught with difficulties and a quick temper. He was kidnapped and sold into slavery, only to be released and find that his beloved father had died. Alois' claims and legitimacy are doubted by many, and for good reason. The Trancy household has a dark secret, beginning with Claude Faustus, Alois' enigmatic butler with supernatural powers. People are left to wonder about Claude's connection to Alois and his true identity. The mansion is filled with lies and deceit, and Alois and Claude's bond is tested with the arrival of hell on their doorstep.