Jack the Ripper : Demon Hunter

Jack the Ripper. The name strikes fear into a shocked and horrified populace in the late 1880s. He brutally murdered several prostitutes and taunted the police over their failure to catch him before he could strike again.

But it's all a mistake. A lie. A misunderstanding. Most importantly, it's ruining Jack Bramley's life. 

Jack Bramley inherited his grandfather's apothecary, his small flat above the store, his battered bicycle for completing deliveries, and his sacred ceremonial dagger for dispatching demons.

No one mentioned that last bit in the reading of the will. 

Now Jack must race against time to dispatch demons and save the soul of his sweetheart. Staying alive would be nice, too.