Within the confines of the royal palace, Lucia Arca led a mundane life as a laundrymaid with a lackluster magical ability called Soap, capable of summoning soap bubbles for stain removal. However, her fate takes a drastic turn when she discovers that her Soap can pacify unruly monsters. Subsequently, the king orders Lucia to embark on a crucial quest alongside the Sacred Maiden, the renowned Dragonslayer, a gifted magician, and a cohort of legendary figures to purify the realm and safeguard the world. Amidst the daunting task of world salvation, Lucia grapples with her newfound role as a savior while realizing that even the most revered heroes possess ordinary qualities. This enchanting tale unfolds as a heartening romantic comedy, spotlighting the journey of an unassuming yet determined protagonist in a realm of extraordinary feats.