In 19th-century England, Sebastian Michaelis, a butler, assists his young master Ciel Phantomhive in executing covert tasks as 'the Queen's guard dog' within the dark underworld. Their routine takes a turn when Queen Victoria personally involves them in investigating the mysterious disappearance of students, including her relative, at Weston College, a prestigious institution. To uncover the truth behind these vanishings, Sebastian and Ciel venture undercover into the depths of Weston College, delving into the enigmatic circumstances surrounding the missing individuals.