The future. The most dangerous prisoners serve their life sentences on the moon. They are convicts who mine silver ore, and this is the only thing they have to do for the rest of the time. They have nothing to lose, they are ready to do anything to see the Earth one more time. There is only one way out - to win your right to be home. Al Gordon is one of the many workers of the lunar corps. She flew to the moon and expects to work out her contract well. But one day the alarm sounds. The rebellious convicts broke free and now have weapons in their hands. The Lunar Corps has been captured. El's life is in danger - she could be discovered at any moment. She has only one way out...