To some, the idea of committing horrendous acts of violence and cruelty against another human being is repulsive. To others, it is a regrettable occurrence, a last resort but always an option. And for a select few, it's a hobby. Locations where a horrifying crime or crimes have occurred are known as "haunted" places. They are relatively harmless, miserable, but lacking any real danger. Ghosts can't hurt you, after all. The same cannot be said for a Revenant. When a person dies in a haunted place, he or she can be resurrected by the spirits inhabiting that physical space and become a paranormal entity with bizarre, lethal superhuman abilities based on the nature of their death. Because of these terrifying powers a Revenant gains upon resurrection, humans struggle to keep them contained in the Mausoleum, a prison designed to contain them and create revenue for scientific research by forcing Revenants to participate in brutal death matches. Naïve young intern Roman Sheer enters this twisted world searching for a purpose in life, but he soon receives more than he ever expected when a long-time resident, the violent, mentally unstable Revenant number Ten, massacres several employees. But during the incident, Ten unexpectedly spares Roman's life, prompting the Mausoleum director to reassign Roman to his case. Roman soon learns that he shares a complicated past with Ten, one which he mysteriously cannot remember. As he attempts to piece together his own past and learn more about Ten, the other Revenants, and the meaning of their existence, he struggles with his perceptions of morality as he descends into the chaotic world of the undead.