Ivy, a young woman and outsider, is kidnapped one evening by Satanists, whose next victim she is to become. And they let her in on a secret: Ivy is said to be a witch and must therefore die.
However, the ritual is prevented by Thomas Wilkins, a deputy detective who has been on the trail of the cult for months. After Ivy's rescue, the two become friends and everything seems to go back to normal in sleepy Kinfolk. Until there are reports of people everywhere who seem to be losing their minds and committing cruel acts. Ivy and Thomas find themselves caught up in these events as the threat grows ever closer and terrible things begin to happen in their hometown. Evil wants to destroy the world with the help of demons, which means that Ivy has to die - because she is one of those who, as the protector of humanity, stands between good and evil. In search of her true identity and purpose, Ivy and Thomas take on the fight against the dark forces...