After a sudden death, Kaoru Nagase encounters a white-clad man claiming to be God, who admits fault for her premature passing. In a bid to compensate, he reincarnates her into an alternate realm. Gifted by the goddess Celestine with a youthful form, potion-making prowess, and a bottomless storage container, Kaoru navigates a medieval world lacking in magic. Her concoctions become coveted by avaricious nobles, but drawing on her past life's wisdom, she endeavors to thrive by leveraging her unique skills.