In this world, there are witches as well as a science of 'witchcraft'. However, the art of 'magic' is still unknown... The half-man, half-beast mercenary and the strange witch Zero manage to defeat Thirteen, who was planning the witch genocide, and make an arrangement with him. For his part, Albus, who was preparing the ritual aimed at sealing the magic, finds himself facing a group of wandering witches who seek to stop him. The mercenary, Zero and Thirteen join forces and go to Albus to protect her, but...