We went in with no expectations, because so many space and sci-fis these days are disappointing. Luckily, this is A-grade all the way.
Poor Mark Watney (Matt Damon) is accidentally left behind when his fellow astronauts are evacuated during a powerful storm on Mars. Injured and with air leaking from his spacesuit, things look bleak for the likeable character. Luckily, Watney is an intelligent and mentally tough bloke who manages to escape his immediate predicament.
In true NASA style, things aren't going so well at their end either. They may have the most brilliant minds on Earth to work with, but unforseen complications crop up and Watney has only himself and meagre provisions for them to work with.