The year is 2072. Soon a volcanic eruption will trigger catastrophic devastation, and the only way out is up. While the world's leaders, scientists, and engineers oversee the frantic production of a space fleet meant to save humankind, their children are brought in for a weekend of touring the Lazarus, a high-tech prototype spaceship. But when the apocalypse arrives months ahead of schedule, First Daughter Leigh Chen and a handful of teens from the tour are the only ones to escape the planet. But as isolation presses in, their uneasy peace begins to fracture.