The planet Terra Amata, on which Dungeon resides, has stopped turning. On one side, total darkness and absolute coldness; on the other, a searing desert and eternal day. The survivors live on a thin slice of earth where day and night meet. A territory known as Twilight. This is the third facet of the Dungeon world - its dark downfall. Marvin, now old and blind, sensing his end, goes on a long trek to the legendary cemetery of the dragons.