The Underwasteland is the hell at the edge of the universe. In the house in the middle of an ash desert, N inherits the title of [Empress] of the Underwasteland. Her tasks are as important as they are monotonous: judging the deceased and taking care of the immense dungeon in which they rest. N's life is boring and lonely until a [hero] offers her an umbrella. "When the time comes, avenge me" is what he asks in return. Between colorful encounters and difficult moments, N must complete at least a thousand years of mandate as [Empress]. A difficult task since some sleepers are more dangerous dead than alive.