The second mission to Mars is coming to an end, to send into orbit remains less than a day. Astronauts ahead of half-year return on the ship Aurora. Astronauts finish their studies on the surface of an alien planet, and two on the Mars Rover sent to rock for Kim-one of the astronavtok. At this time on Mars dust storm begins, the astronauts ' base turns out in the center of the cyclone and loses touch with the ship.
Kim was disappointed that their expedition made no discoveries and, in the meantime, another astronaut, Marco, examining with a microscope samples of rocks, makes the long-awaited opening, but hides it from his comrades and is seeking permission to leave on surface for repair of gamma-ray sensors. Having received permission to take a second Rover, Marco goes for new rock samples and proofs of the existence of life on Mars. And Kim crawls into the computer of Marco and all will learn of his discovery. Expedition commander gives the order to second the craft to return to base, but Marco does not listen to him, and soon an incident happens, which completely changes the outcome of the expedition.