In her mid-20s, consumed by a work-centric lifestyle, Sei's life takes an unexpected turn when she is summoned to a different realm and bestowed with the extraordinary power of a living Saint. Much to her surprise, the locals pay her little attention despite the kingdom's urgent need for a savior, as she realizes she was merely the second choice. Embracing solitude, Sei delves into her newfound abilities within the confines of the royal Research Institute, delving into the enigmatic realm of magical elixirs. Through her compassionate aid to the ailing, her true potential gradually comes to light. Could Sei, against all odds, emerge as the much-awaited Saint destined to bring salvation to this unfamiliar world?