In the enchanted European Middle Ages, Aldo Irving carries out magical assignments, creating potions, selling them in his shop on the ground floor of his house. A soft, sarcastic runemaster, alchemist and witch, Aldo's gaze pierces the veil between the magical and the mundane, accompanied by a catboy familiar (who embodies the delicate balance between the mystical and the tangible) working as a witch in his shop, offering potions, herbs and flowers to customers.