Teskoy Prison is a penal facility under the control of [[The First World]]. It is a pocket universe from which nobody has ever escaped, and is where [[The Sword]], pending his trial, as well as the unnamed brunette woman have been incarcerated.
The Teskoy Prison pocket universe is situated part way within the multidimensional inner shield that protects [[The First World]]. It is little more than a splinter universe, which contains a version of Earth and not much else, lacking both stars and a sun or solar system. The planet has no sources of light or heat besides that generated internally or through inter-dimensional friction. All inhabitants of the planet otherwise live in permanent darkness, with no system of government, support infrastructure, or order.
[[The First World]] uses Teskoy Prison as a location to incarcerate, or dispose of dangerous entities and prisoners. Those held temporarily are kept in cells within a facility lodged within the wall of the reality itself, some thousands of feet above the surface of the planet below. The facility also contains a large helijet bay. Permanent prisoners are given a parachute and dropped to the planet below to fend for themselves. Occasional retrievals occur through use of the helijetsin the bay. Teskoy Prison is accessed via a similar method used in the portal generators in [[Portal hub facility]] installations, however the portal generator is considerably smaller, and is mounted upright, generating a portal that can be walked through. This portal has a destination within an empty room, as such entry and exit from the pocket reality is only possible via a portal generated from outside the reality itself.