Year 16536, the intergalactic empire prisons are full of prisoners serving life sentences.
This sophisticated incarceration system requires the use of so many resources that prisoners are obligated to work for the prison and those who complain are eliminated.
Among the different jobs sourced to the prisoners, the single most dangerous and unwanted job allows the prisoner to obtain freedom.
This job is called galactic miner.
These volunteers are chained to mining envelopes, inter-stellar spaceships containing enough technology to destroy space parasites and to extract rare minerals.
These envelopes are then launched through the infinite vacuum of space where prisoners find themselves completely isolated to perform their mining tasks with only the rare encounter with E.T. sellers and the noise of the inter-prisoner communication channels to keep them company.