It has been a centuries since humanity fell into madness. Those who fall are called the Broken – monstrous manifestations of their former selves that devour any living thing in the hope to regain what they have lost. This was the apocalypse, what forced humanity underground, where the darkness slowed the madness. But in the darkness, humanity lost their coloured eyes and the ability to reproduce. Instead, they are now born from a machine called sy-STEM. None born from the machine fall to the madness. There are, however, anomalies. Those with the coloured eyes – the Hunters.