Servant of Duty follows the story that began with book one, Between Heaven and Hell. Troy Kensington is a man endowed with extraordinary abilities and longevity because of demonic possession. Servant of Duty is a continuation of his journey of discovery and towards his goal of freeing himself of his powerful and deadly evil spirits. This new journey follows him as he battles his grief, endures servitude, is forced to spill much blood, defends the helpless, and the discovery of an astounding secret.