It is 2030, and a three-person human crew are on a ship travelling to Mars as part of a colonizing mission. Four years earlier, three robots were sent to the planet to build the base for the humans but when the human crew arrive, they discover a third of the base has been destroyed and only two of the three robots remain. When the humans question the robots, the robots offer two overlapping but different stories: the first believes they were attacked by a hostile extra-terrestrial 'other', the second attests the attack was the result of a violent malfunction on the part of the third robot - a being that still stalks the Martian desert. As the mystery slowly unravels, the humans and the robots play a deadly game of cat and mouse to find out the truth of what has happened at the base. As secrets are revealed - about both the humans and the robots - the truth about what has happened at the base comes to light in a horrifying and gruesome c