David (Jake Gyllenhaal), Miranda (Rebecca Ferguson), Rory (Ryan Reynolds), Xiu (Hiroyu Sanada) and Hugh (Ariyon Bakare) are astronauts working on the same spacecraft. By accident, they discovered an immature life form on Mars. Xio brought this living organism back to the laboratory. What everyone didn't expect was that this small cell actually began to grow rapidly under the stimulation of the outside world. As the life form grew up, the development of the situation began to get out of control. The life form showed strong attack power and superb intelligence, killing several crew members one after another. Not only that, David found that life forms seemed to want to land with the spacecraft to earth, and once its plot succeeded, humans on earth were bound to face extinction.