Esta es su sinopsis:
As their last day on Mars draws to a close, the astronaut crew is on the verge of a major breakthrough – collected rock specimens reveal microscopic evidence of life. Meanwhile, communication is underway with AURORA, the approaching spacecraft that will relieve the crew of their operations. In their last hours on the planet, two astronauts go back to SITE 9, a cavernous valley on the surface of Mars, to collect further evidence of their discovery. But a routine excavation turns deadly when one of them falls to his death and his body taken host and re-animated by the very life form they sought to discover.