Amara Black cleans houses for a living. Well, she cleanses them of tenacious spirits. Because of her work, she spends most of her days traveling across the country from one haunted house to the next. This leaves little downtime between jobs, but she enjoys her freedom. When a cleaning goes wrong, Amara finds herself in police custody and learns that her pattern of showing up in various towns during inexplicable attacks has made her a person of interest in an ongoing FBI investigation. As she discovers more about herself and the path she's chosen, she discovers that her freedom -- and humanity -- are at risk.