A police procedural with thriller elements. The eighth installment in the series. Bodies with disturbing markings are recovered from a bog, sending Sergeant Corinne Aleckson and Detective Smoke Dawes on a quest to find the person responsible for the depraved acts. They search through missing persons' files, consult an FBI profiler, and are soon in pursuit of an angel of death. Their investigation leads them into unchartered and dangerous territory. But they'll stop at nothing until they put an end to the evil angel's reign.