Set in late-nineteenth-century England, the first season follows Ciel Phantomhive, the head of the Phantomhive family and the Queen's Watchdog. Though, he had suffered tremendously; his beloved parents were brutally murdered, and he was subsequently abducted and violently tortured. Seeking revenge, he set up a Faustian contract with his demon butler Sebastian Michaelis, trading his soul in the process. Together, they stealthily monitor the underground society of London, under the command of the Queen, to investigate and eliminate those who commit evil.