Penny Meyers works for the Department for Extraordinary Responders, a government agency tasked with managing threats that fall outside the normal limits of law and reason. As Thanatos, she leads a small, uneasy team: Ben Stills, a war-veteran experiment trapped in the body of a giant moth; Fred Tulley, a fire-wielding former criminal and former cop who's an asshole, and Lucia Enright, a demon whose strength is matched only by her people-pleasing. What will happen when Ben has an episode during a job? What happens when a forgotten villain from Penny's past resurfaces? What happens when Fred reaps what he sows? What happens when Lucia faces her lovecraftian past?