Essentially a story of survival. Five men on a trek across a desert.
But not, necessarily a "desert planet."
They crash in or by an ocean. Plenty of water there. They have to get across a desert. Okay.
Maybe they will, maybe they won't.
But earth is much the same. Breathable atmosphere and desert bordering ocean. Southern California, Northern Africa present the same geography.
Not a lot of a-c-t-i-o-n as it is more of a psychological story than an action one.
I gave it a four because I have been spoiled by modern special effects and glitzy production but the scenery during the desert day shots is great.