In the midst of a never-ending war between humans and demons, the enigmatic Clairysviel Adeola Noctis, also known as "The Black Death," is determined to create the legendary Philosopher's Stone. Her obsession leads her to create a powerful mechanized doll named Luciel Diamanda to infiltrate the Mage Association and steal the Quartz Megistus, a Magicite with the potential to fulfill her wishes. However, Clair's grand plan takes an unexpected turn when Luciel awakens not as a formidable mage but as a crying, helpless baby doll. Now faced with an unexpected challenge, Clair must navigate the complexities of motherhood while still pursuing her ambitions.