Raz Wynn is an Ice baby—part of a human race genetically altered to colonize a cold planet where survival dictates everything. But another colony lives in the warmth of the underground. The Kommons. The unaltered humans. Abandoned by their mother country on Earth, the two colonies stand at odds over who will ultimately inhabit the planet. When Raz discovers the unfathomable sacrifice her colony expects her to make in order to secure the future of her race, she does the only thing she can do. Run.