In a futuristic world nearly destroyed by religious extremists, Justin March lives in exile after failing in his job as an investigator of religious groups and supernatural claims. But Justin is given a second chance when Mae Koskinen comes to bring him back to the Republic of United North America (RUNA). Raised in an aristocratic caste, Mae is now a member of the military's most elite and terrifying tier, a soldier with enhanced reflexes and skills. When Justin and Mae are assigned to work together to solve a string of ritualistic murders, they soon realize that their discoveries have exposed them to terrible danger.