A generation ago, continent-sized storms called hypercanes caused the Earth to flood. The survivors were forced to retreat deep underground and build a new society. This is the story that sixteen-year-old Jansin Nordqvist has heard all of her life. Jansin grew up in a civilization far below the Earth's surface. She's spent the last eight years in military intelligence training. So when her parents surprise her with a coveted yet treacherous trip above ground, she's prepared for anything. She's especially thrilled to feel the fresh air, see the sun, and view the wide-open skies and the ocean for herself. But when raiders attack Jansin's camp and take her prisoner, she is forced to question everything she's been taught. What do her captors want? How will she get back underground? And if she ever does, will she want to stay after learning the truth?