Valentina knows how to live in the community spread throughout the old mining caves under the Martian ice cap. A violent place in a forbidding climate, but home for her and her brother.Until she wakes from a coma to find her brother gone. Her father thinks her incapable of following them back to the equatorial cities.He underestimates her - her stubbornness, her courage and her inventiveness. But she underestimates the cold, airless surface of Mars.A journey from the polar ice cap to the Martian equator? Not enough to stop Valentina. Not with her brother on the line.