In 1868, Comanche warrior Spotted Tongue finds his second wife's body in Palo Duro Canyon, murdered by one of his fellow Comanche. To spill the blood of Spotted Tongue's wife is a forbidden act. Comanches do not murder other Comanches, and Little Flower became a Comanche when Spotted Tongue married her. But Little Flower was a white captive first, and many of the Comanche still despise her. But who hated her enough to break a taboo by murdering her. Spotted Tongue vows to track down the murderer and exact his own revenge. In the present, Megan Clark and members of the Murder by the Yard Reading Circle are enjoying a picnic in Palo Duro Canyon. When Megan's two beagles escape and dig up a blue shirt filled with bones, she and reading group find themselves involved in another murder case, much to Dr. Ryan Stevens' horror. The situation escalates when Megan discovers another body next to her beagles' discovery, this one the mummy of a long-dead woman. As Spotted Tongue searches for a murderer in 1868, so does Megan in the present day. The two detectives, separated by time and race, each confront a killer, so that the two victims may find peace.