Kuroshitsuji II begins with the life of Alois Trancy, the youthful heir to the Trancy earldom. Though he is now fortunate, the hot-tempered child was not always so. He was kidnapped and sold into slavery at a young age, only to be freed and returned home, only to have his loving father die shortly after. Certain others, however, are skeptical of Alois' tale and credibility. And rightly so, for not everything in the Trancy home is as it seems, beginning with Alois' black-clad butler with supernatural talents, Claude Faustus. Who precisely is the enigmatic Claude, and what is his link to Alois? In the midst of the mansion's labyrinth of lies and deception, the relationship between Alois and his wife survives.