At the bidding of Queen Victoria, Earl Ciel Phantomhive travels to Weston College—a distinguished all-boys public school famed for its customs and excellent academics—to find a missing member of her family who has not been seen in several months. Owing to his noble rank, the thirteen-year-old Ciel quickly manages to enroll as a pupil, while his demonic butler Sebastian Michaelis takes up a teacher role at the institution.
Ciel is caught off guard when he fails to discover the Queen’s relative anywhere on the grounds. Compounding the problem, he is unable to secure a meeting with the college’s headmaster, who might be the sole individual with knowledge of the disappearance. Those who regularly interact with the headmaster are the dormitory leaders, called the Prefect 4 (P4): Edgar Redmond, Lawrence Bluewer, Herman Greenhill, and Gregory Violet.
To succeed in his mission, Ciel must devise a strategy to earn the favor of the P4 and leverage their connections. However, the prestigious school and its students conceal many hidden truths, rendering this endeavor far more difficult than he ever anticipated.