Kuroshitsuji: Book of Murder

A young master named Ciel Phantomhive organizes an extravagant banquet for London's upper class at the request of the Queen. The event turns grim as attendees start dying under mysterious circumstances. To solve the case and avoid further danger, Ciel and his butler, Sebastian, work alongside the guests, including the famous writer Sir Arthur Conan Doyle, to uncover the killer's identity and stop the murders.