Life on the desert planet Penumbra is cruel and unforgiving, but Jonathan Crowe is more than familiar with it. He and his teenage son, William, brave the desolate terrain day and night with their jobs as rover wranglers. For them, a brush with danger is all in a day work from the scorching heat to the screamers that prowl the sands. They risk it all for the greater good of the colony they live in. However, nothing strikes fear more than Penumbra's...