Crash landing!
After a rowdy victory celebration following the battle of Europa, Bob goes for a stargazing trip in the desert and wrecks his speeder. Stranded, he soon finds he isn't alone. Harbeasts, the savage, fearsome, genetically engineered predators that roam the Martian deserts are hot on his trail!
With no water or food, limited air supply, no working vehicle, and the nearest way-station days away, Bob finds himself in a dogged fight for survival. Unfortunately, he also finds that the harbeasts aren't the only predators out to get him.