To earn money for his daughter's treatment, family man Mills from the planet Somaris takes on a two-year exploratory mission. On the way, his ship enters an uncharted asteroid belt and crashes, breaking apart on an unknown planet. Mills discovers the only survivor among the cryostasis passengers, 12-year-old Koa, and also learns that the area harbors deadly dangers — they have ended up on Earth 65 million years ago. However, there is still a chance for salvation, and for that, Mills and Koa need to reach the rescue ship, which is stuck at the top of a mountain.