Atonement is a prison-fort guarded by the gold dragon Zandroanyx and the Shroud of Justice, located on the island of Nakazani.
Atonement, and the island of Nakazani more generally, has innumerable magical countermeasures in place to prevent escape, as well as wards and alarms to let the dragon Zandroanyx know the current positions of everyone. Even should a prisoner leave their designated area, Zandroanyx invariably is aware and can re-secure them at a moment’s notice. It is, however, quite an exceedingly rare occurrence for anyone to even get that far.
Conditions for those imprisoned in Atonement are actually quite good, considering the various reasons they ended up there. Prisoners are provided many pleasures of life, including comfortable and spacious living quarters, quality meals, recreation activities, and time in the sun. They are, however, expressly forbidden from communicating with each other. Zandroanyx believes these conditions provide the best chance to draw the prisoners away from evil. All interaction with prisoners is handled by the shield and preceptor archons.
Most prisoners in Atonement are there because of what they were yet to do: nefarious schemes, cultist plots, and evil designs of all sorts have led to individuals being abducted by Zandroanyx's agents. As such, most prisoners are or were powerful and influential individuals, but not exceedingly so. However, Zandroanyx also believes in bringing justice to those who have already committed their terrible acts. The most high profile of the dragon’s prisoners is Nebt-Setau, the Khapeshan wizard who destroyed the Kingdom of Akhom.