A Gamma Quadrant world whose authorities convict Miles O'Brien of espionage and punish him by implanting the memory of twenty years in prison, as told in Hard Time.
In Hard Time, set in 2372, O'Brien is visiting Argratha when his curiosity about local technology leads to a charge of spying. The Argrathi do not build prisons. Instead they give a convict artificial memories of a sentence, so that a term of years is lived through in a few hours.
By the time Kira arrives to protest, the punishment has been carried out and cannot be undone. O'Brien returns to Deep Space 9 remembering two decades in a filthy cell, and Bashir can find no way to erase the experience.
He struggles to resume his life, lashing out at his family and friends, and is haunted by visions of his cellmate Ee'char. Only when he is close to suicide does he admit to Bashir that, in the simulation, he killed Ee'char over a scrap of food.