This is another steampunk mashup in a “League of Extraordinary Gentleman” vein. The heroine is a free-lance police investigator who sometimes changes into her alternate aggressive form because her father is “Dr.Jekyll and Mr. Hyde” and she inherited it. Changing shape instantly heals her, but her “Miss Hyde” form is extremely impulsive and constantly second-guesses herself.
Besides Dr. Jekyll, this swings for the fences in mash-ups. Jack the Ripper is in love with her; real-life computer pioneer Ada Lovelace is a robot who runs the secrete police along with an immortal Sir Isaac Newton. Her boyfriend is merely a werewolf secret policeman. Bad guy #1 is “A Picture of Dorian Grey”, while future bad guy#2 is an evil version of reclusive government mastermind Mycroft Holmes.
The plot follows the rules pretty well: lots of personal problems, some are clues; stupidly impulsive behavior which sometimes advances the plot; romance which also advances the plot; worries about money. She even gets to attempt to reconcile with her partly estranged father.