A bronze bell engraved with strange runes is controlled by the criminal madman "The Bell Ringer". When the bell rings, they will be forcibly pulled into a bronze mirror world in different time and space. The replica is based on real history or the dark corners of real society, and is full of tragic undertones. The puzzles and "humanity multiple-choice questions" left by the "Bell Ringer" are hidden in the dungeon. The protagonist group witnesses the different endings of different people in the dungeon events, and there are also puzzles for each person, whether to protect or be protected.
Concept: human nature, society, group portrait