Murdoch finds himself teamed with a Scotland Yard Investigator who thinks the serial killer they're pursuing may be none other than Jack the Ripper. Murdoch invites Dr. Ogden to an up-coming ball, and to prepare for it, dancing lessons are the order of the day.

A youthful Harry Houdini becomes the chief suspect when the bank adjoining his theater is robbed and a guard is murdered. But, he ultimately helps Murdoch find the culprit. Meanwhile, Dr. Ogden's sister comes to visit and soon becomes attracted to Murdoch.