Black Butler, Vol. 11 v. 11

Is that butler really deceased?! Jeremy, the great detective who arrives at Phantomhive Manor at the behest of the late Sebastian, is actually - ?! In order to effectively execute his own plan to catch a killer at the manor before his untimely passing, what other machinations did the unparraled manservant put into motion?! Will the case of the Phantomhive Manor Murders finally be closed? And will the house get its butler back? Or is this really the end?