In an indeterminate future, humans have developed possession and the use of magic. Out of fear and envy, the possessors of magic are marginalised and cast out by those so-called 'normal' people. Those with too great a power is considered dangerous and called Anomaly. Kieran is a Hunter who captures Anomalous, people who possess magic and are considered dangerous. Zoe, a childhood friend, is considered an Anomaly, and her family was exterminated by Kieran's father, known as the Cerberus, who works for the Agency. Both want to know the truth behind the Agency's persecution of those with magic and they also want revenge against the Cerberus.