Welcome to the future! Since mortality has been overcome, the Earth is completely overpopulated. All of Europe has merged into a single megacity of gigantic residential towers. Only the rich and powerful can afford a carefree life in the upper floors, while the majority of the population struggles to survive in the lower levels. Reproduction is strictly regulated, and illegal births are relentlessly prosecuted. When Officer No. 717 is assigned to take down the leader of a terrorist group, he becomes entangled in a conspiracy that reaches into the highest echelons of society - one that will shake the brutal order to its core.