A cold case heats up when a 9-1-1 call puts police at a Denver murder scene, pointing investigators to the abduction of a Colorado teenager fourteen years earlier. A calling card—a single black pearl—is found on the newest victim. Is the murder a copycat? Or has a twisted serial killer, thought dead or in prison, returned to strike again?

Soon, the hunt for a multi-state killer is on and brings together an unexpected team: a Denver Major Crimes police lieutenant; an FBI special agent who investigated the previous murders; a rookie FBI agent with a specialty in psychology; and the only living victim of the Black Pearl Killer, who is now a cop.

For Special Agent Brian DiPietro, the case is an opportunity to find answers. For Officer Allison Shannon, the case will force her to face down the town that blamed her for surviving when another did not. And for both DiPietro and Shannon, it’s a chance for both to find closure to questions that have tormented them for years.