Stumbling onto a murder scene that a reporter likens to the crimes of Jack the Ripper, young detective constable Lacey Flint races against time to prevent additional deaths and realizes that the killer is taunting her with secrets from her past.

Newly arrived in 1892 New England, Abigail Rook becomes assistant to R.F. Jackaby, an investigator of the unexplained with the ability to see supernatural beings, and she helps him delve into a case of serial murder which, Jackaby is convinced, is due to a nonhuman creature.

"For three years, Investigator Cassie Dewell has been on a hunt for a serial killer known as The Lizard King. He works as a long haul trucker. His prey are the "lot lizard" prostitutes who frequent truck stops. And she almost caught him...once. Working for the Bakken County, North Dakota sheriff's department, Cassie has set what she believes is the perfect trap and she has lured him and his truck to a depot. Standing by, ready to close the net are...