The year 2242. Earth is doomed. Among the 50 million chosen to fly to the new planet is the pregnant daughter of the ship's captain. Her boyfriend Noah is not on the list, so he has to trick his way aboard and pretend to be a janitor. While most of the passengers and crew are in anabiosis, Noah, in the company of his former partner Clay, goes about his daily routine and gets to know his colleagues. But soon an aggressive alien life form is discovered on board, threatening the very existence of humanity.