During a routine investigation into a demon attack, a hunter in training, Yadin, and his mentor, Ralf, come face to face with an unexpected, dangerous and powerful foe. After sustaining an injury, Yadin must come to terms with what line of work he is currently being trained for and the cost of it, while still investigating what really happened in that attack and what involvement a mysterious girl named Amelia had in all of it. Their investigation takes them deeper into an intricate plot with the fate of the world hanging in the balance. They must use all their power and training if they are to save it.