The Noah's Arc Circus team has captivated spectators with its magnificent shows, which are full of surprise and excitement. These incredible performances, however, do not come cheap. Children have inexplicably gone missing in London, corresponding with the activities of the organizations. Queen Victoria, alarmed by the kidnappings, dispatches her legendary guard dog, Ciel Phantomhive, and his ever-faithful demon butler, Sebastian Michaelis, on an undercover mission to recover the stolen children. Trying to reconcile their new circus performances with their secret investigation under the big tent, on the other hand, becomes difficult. With the circus's other performers getting suspicious and the threat of the circus's mystery patron hovering overhead, what the two find will upset Ciel to his core.