A modern Japanese scientist reincarnates after death as an eight-year-old girl named Ellen, who lives in a fantasy world. The girl has the ability to alter the composition and structure of substances. Moreover, her parents are not ordinary: her father is Rovel, a legendary hero; her mother is Oridjin, the queen of spirits. However, her brother, Prince Ravisel, schemes to seize the power of the spirits, so Ellen must use the knowledge from her past life to oppose him.