In a not-so-distant future, mankind's greed and short-sightedness have exhausted the planet. The vast majority of the population lives in misery among the ruins of civilisation, while a small, privileged minority continues to enjoy a luxurious existence inside a few fortress-cities scattered around the globe, the Enclaves. Vivian is a member of the elite forces that protect this utopia - but also regularly hunt down and capture people from outside the walls to use as cheap, forced labour...