A century ago the world flooded, killing off most of the world’s population. All who remain are scattered communities of drifters and the elite Philosophes who live in a walled city above sea level.
Amidst a growing drifter rebellion, sixteen-year-old Gwyn travels to the university in the city to bring help back to her dying community. When she gets there she discovers a game-changing secret that the university has been hiding for over a hundred years. Can Gwyn find a way to save the last of humanity from all-out war or does she fall for the wiles of the drifter rebel, Zack?