When bike courier Chris witnesses what looks like a murder, his first instinct is to cut and run. But when his curiosity draws him back in, he's soon embroiled in a world of corruption, political power, and illegal bike racing.

With only three weeks left in his three year contract, Sam Bell is getting anxious to finally return to Earth. He is the only occupant of a Moon-based manufacturing facility along with his computer and assistant, GERTY. When he has an accident however, he wakens to find that he is not alone.