The world is running normally on the surface, but there are undercurrents. There are a large number of "anomalies" (Anomalies) that violate physical laws, logical common sense or cause cognitive pollution. They come in different forms: a coffee cup that moves on its own and changes its contents (Safe level), a melody that plays at a specific frequency and plunges you into an eternal nightmare (Euclid level), a thick fog that swallows the entrants and transforms them into non-Euclidean geometry (Keter level). These anomalies are known to a few covert organizations (official or unofficial) and try to control them, but the anomalies themselves are unpredictable and containment breaches occur from time to time.