A labyrinth as deep as the sky is high and as ancient as the mountains contains a fabled treasure at its very depth, but it also contains monsters with the sole goal of protecting it at all costs. One monster, who goes by the name Jakob, was once human but now banished to the darkness as a creature capable of causing any living being he touches to explode and become part of him. This story follows him and the witches who want the labyrinth's secret and also his head.