19世紀英国｡ ”悪の貴族”と呼ばれる少年の側には､必ず一人の”執事”がいた｡19世紀後半､ヴィクトリア朝時代の英国｡名門貴族・ファントムハイヴ家の執事・セバスチャン｡彼は､知識・教養・品位・料理・武術…全てにおいて完璧｡わがままな12歳の主人・シエルを相手に､今日も漆黒の燕尾服姿で華麗に執務をこなす｡ 上質な執事アニメで､至高なるひとときをあなたに…｡

19세기 영국.

'악의 귀족'이라고 불린 소년의 옆에는,

반드시 한 사람의 '집사'가 있었다.

19세기 후반, 빅토리아 왕조 시대의 영국. 명문 귀족 팬텀하이브가의 집사 세바스찬,

그는 지식, 교양, 품위, 요리, 무술... 모든 것에 있어서 완벽했다.

제멋대로인 12세의 주인 시엘을 상대로

오늘도 칠흑의 연미복 차림으로 화려하게 집무를 수행한다.

 ...

时值19世纪，在英国名门贵族凡多姆海伍家，有一位神秘、优雅、十全十美的执事，他就是“黑执事” 塞巴斯蒂安。虽然塞巴斯蒂安总是淡淡地说： “我只是一名执事罢了”，但举止、知识、品味、料理、武术等等没有任何事能难得倒他！塞巴斯蒂安的主人，是年仅12岁就位居凡多姆海伍家族的当主——夏尔。夏尔不仅只花了短短3年的时间，就让凡多姆公司成为英国最大的零食玩具制造商，更在台面下为女王执行秘密任务，因此又被称为“邪恶贵族”！塞巴斯蒂安除了负责照顾夏尔的日常生活起居之外，还得帮成事不足、败事有余的家仆们收拾善后。最重要的是，塞巴斯蒂安必须因应夏尔各种任性的要求，优雅达成不可能的任务！“身为 凡多姆海恩家的执事，怎能连这点小事也办不到？”为了主人夏尔，塞巴斯蒂安将尽心服侍、实现主人所有的愿望。

In Victorian-era London, on the night of Ciel Phantomhive's tenth birthday a fire destroyed his manor and killed both of his parents. In a moment of death Ceil strikes a deal with a demon, his soul in exchange for revenge. This demon becomes his butler and calls himself by name of Sebastian Michaelis, to protect and serve Ciel until the deal has been completed. One month after the fire Ciel returns from being missing, with his new butler Sebastian. Ceil is now the head of the Phantomhive corporation, handling all business affairs as well as the work as the Queen of England’s guard dog and looking for his parents murders.