Craig Johnson explains that his latest Walt Longmire mystery is inspired by the Dinosaur Wars, which took place in the 80’s between a rancher, his tribe, and the FBI over dinosaur bones discovered on the rancher’s land. The dinosaur in this story is named Jen, and she is a T. rex found on Danny Lone Elk’s ranch.
But first, Walt is called by Omar Rhoades, who has found a body in a fishing hole on Lone Elk’s ranch. It is Danny Lone Elk’s body, and it appears the old man has drowned. Still, Walt isn’t prepared to rule the death an accident, because Danny Lone Elk was a good swimmer.
With Danny Lone Elk’s body in his truck, Walt is driving back to town when he hears shooting. The Lone Elks, it turns out, are trying to drive out Dave Bauman of the High Plains Dinosaur Museum, who has been excavating the T. rex. Dave insists that he has permission from Danny and says he will verify it. Jennifer Watt, the discoverer and namesake of Jen, says she has proof of the agreement, which she videotaped. Randy Lone Elk has been actually trying to dig up the valuable skeleton with a back hoe.
Walt is not happy to return to town to find Skip Trost, an ambitious acting deputy U.S. attorney, who is determined to assert a federal claim to the dinosaur bones. In the meantime, Walt is supposed to be preparing for his daughter Cady’s arrival from Philadelphia with her five-month-old daughter Lola.
Cady has no sooner arrived than she receives a call from the Philadelphia Police Department. Her husband, Michael Moretti, was killed on active duty. Cady and her baby are soon rushing back with Vic, Walt’s undersheriff and Michael’s sister. Walt and his friend Henry Standing Bear are worried that Michael’s death is related to a previous case involving a Mexican hired killer.
As usual, this novel includes a lot of action and is peopled by the recurring characters we grow to like more and more. And there is another pinch of the supernatural. The spirit of Danny Lone Elk has appeared to Walt in dreams and is trying to tell him something.