The spaceship on which Sigrid, a soldier of the Space Department, was flying, exploded. Only she managed to get to the lifeboat, but the planet where the girl found herself had been uninhabited for a long time. All its inhabitants died out - the sneezing fever viruses, fatal to humans, spared no one. Sigrid understands that she has a small chance to survive before the infection has time to spread throughout her body. If the information from the on-board computer is correct, somewhere underground, in the desert, there is a huge cube city. True, no one knows what awaits the girl inside him and whether salvation will turn into a real nightmare...