A Cardassian world with a labour camp to which Thomas Riker is sentenced for life after his seizure of the USS Defiant in the episode Defiant.
In Defiant, set in 2371, Thomas Riker poses as his counterpart William Riker, steals the Defiant from Deep Space 9 for the Maquis and takes it into Cardassian space to expose a secret Obsidian Order fleet in the Orias system.
Sisko, working alongside Gul Dukat in the Cardassian capital, negotiates an end to the incursion. The Defiant and its Maquis crew are returned to the Federation, the ship's sensor records go to Dukat, and Riker surrenders himself to the Cardassians.
The usual penalty would be death, but Sisko obtains a sentence of life at the labour camp on Lazon II. Kira, who was Riker's prisoner aboard the Defiant, promises that he will not be forgotten there. His later fate is not revealed on screen.