Chief Detective David Wolf's son has a new girlfriend, and when she discovers her father-a well known man in ancient fossils trade circles-has been murdered, she and the rest of her shattered family turn to Wolf to bring them justice. With the help of a small town sheriff and a retired police dog named Jet, Wolf follows the clues to a dig site in western Colorado, where secrets have been entombed for eons, and people are dying to keep them that way. In a place where killing monsters are buried under the earth, it becomes clear there are still some roaming topside, Wolf must keep his wits or it will be his bones found next.