Plot

A group of astronaut explorers succumb one by one to a mysterious and terrifying force while collecting specimens on Mars.

On the last day of the first manned mission to Mars, a crew member of Tantalus Base believes he's made an historic discovery; fossilised evidence of bacterial life. Unwilling to let the relief crew claim the glory, he disobeys orders to pack up, and goes out on an unauthorised expedition to collect further samples. But a routine excavation turns to disaster, when the porous ground collapses, and he falls into a deep crevice and near certain death. His devastated colleagues attempt to recover his body. However, when another vanishes, they begin to realise that the life-form they have discovered is highly dangerous to all human life.—AnonymousB

The crew of the Tantalus Base is ready to finish the activities in Mars and preparing to return to Earth after a six months mission on the Red Planet. After a sand storm, Commander Charles Brunel summons the team composed by Vincent Campbell, Rebecca Lane, Kim Aldrich, Robert Irwin, Marko Petrovic, Richard Harrington and Lauren Dalby for a last meeting. However Marko tells that he needs to fix a sensor and he goes with Harrington in a rover to the place. The loathed Kim barges into Marko's computer and finds that he has secretly discovered some sort of bacteriological life in Mars. Meanwhile, the ground collapses beneath Marko and he falls and dies in a hole. Harrington asks for help and Brunel and Dalby arrive at the spot. Brunel realizes that they need a cargo gear equipment to rescue Marko and Dalby stays at the pit. When they return, Marko and Dalby have vanished and Campbell explores the pit. Meanwhile, Marko and Dalby appear at the base and the Martian bacteria have transformed them in zombie-like creatures. They attack Harrington and break in the outpost, attacking the crew. Each one that dies turns into zombie. Will the survivors succeed to escape from the zombies?—Claudio Carvalho, Rio de Janeiro, Brazil

Nine astronauts endure a six month mission to Mars in hopes of finding some sign of life. Ironically, they only find death in the form of a bacterial infection that transforms the victims, one by one, into zombie like creatures. As the zombie count increases and the number of "living" astronauts decreases, a race against time unfolds for any astronaut hoping to return to earth safely.