January Ian Mariposa, Jaim to his friends, and his feline familiar Bastet, have acquired a device that allows them to travel back in time. One scholarly subject that has always fascinated him is the influence that the Cthulhu Mythos had on Victorian society of Great Britain in the last quarter of the nineteenth century. As such, he spends a great deal of time in London of the 1880s.

However, he needs a way to support his pretense of being a dilettante aristocrat, and what better way than to pose as a consulting detective in the manner of Sherlock Holmes? He expected most of his cases to be fairly mundane, if occasionally macabre or grotesque, but some turn out to be more eldritch than he anticipated.

Such as, the time Scotland Yard called on him to examine a body....