Year 2038: The mineral resources of the earth are drained, in space there are fights for the last deposits on other planets and satellites. This is the situation when one of the bigger mining corporations has lost all but one mineral moons and many of their fully automatic mining robots are disappearing on their flight home. Since nobody else wants the job, they send prisoners to defend the mining station. Among them undercover agent Stone, who shall clear the whereabouts of the expensive robots...