The war between Earth and the lunar colonies ended with a 10-kilometer lump of iron dropped from the moon--a man-made armageddon that destroyed everything and everyone on the home planet. Now the 'Luners' fight for their survival against the deterioration of their habitats, and the need for precious raw material forces salvage crews to comb the landscape and collect scrap metal from the millions of camouflaged mines left over from the war. When a young boy is caught stealing a vac suit to pilfer scraps out on the surface, a suspicious veteran of the salvage crew hires the boy to set a trap for the ringleader of the black market.