Brain scientist Nobuko Nakano is racing to meet a thesis deadline when she collapses from overwork. She regains consciousness in a strange medieval‑era world, confused and disoriented. Almost immediately she stumbles upon a girl about to be burned at the stake and, acting on instinct, saves her using simple scientific knowledge that the locals mistake for magic. Word spreads, and Nobuko is soon hailed as a witch or a savior as she continues to apply modern science—psychology, chemistry, physics—to solve one crisis after another.

Her growing reputation draws the attention of the royal court, and she is pulled into a power struggle among the nobles. She finds herself pitted against Olivier, the kingdom’s most powerful sorcerer and a court‑employed practitioner of supernatural arts. Their confrontation escalates into a public contest, forcing Nobuko to rely entirely on her scientific reasoning rather than any innate magic. The story follows her efforts to navigate this unfamiliar society, earn allies, and prove that rational thought can triumph over superstition, all while she struggles to understand the strange rules of the world she has been thrown into. The narrative is built around a series of problems—medical emergencies, engineering challenges, social conflicts—that she overcomes by cleverly adapting Earth‑era knowledge, and culminates in the high‑stakes duel with Olivier that tests her ingenuity and resolve.