This story begins with a fire and an explosion when something goes wrong during one of Felicity Carrol's scientific experiments. It is a great introduction to a young woman far more interested in science, history, and medicine than in following the path of most rich, well-bred young women into marriage.
She has no relationship with her father who has ignored her since the death of her mother and older brother when she was a small child and left to the servants to raise. However, she found a new father figure in Earl William Kent who was her mentor when she attended the university. When she learns that Kent has been murdered and a valuable artifact related to his strong interest in King Arthur stolen, Felicity is determined to bring his killer to justice.
Scotland Yard is also on the case in the person of Inspector Jackson Griggs Davies who isn't necessarily eager for Felicity's help. However, her photographic memory and extensive knowledge of history do give him clues he wouldn't otherwise know. When Kent's murder is only the first of a series of murders where the victim is distantly related to royalty and a collector of items related to King Arthur, Felicity needs to increase her knowledge of the new science of forensics which includes taking fingerprints to find the murderer.
This story has an intriguing main character who is brilliant but also vulnerable. Her desire for her father's love and respect made me feel sorry for her. I did like that she wasn't afraid to venture into situations that were unfamiliar to her like visiting thieves and villains. I liked her relationship with Davies.
This was a good start to a historical mystery series with a great setting and interesting characters.