When high school student Sami Yoshino gets entangled in a gang altercation, her day takes a drastic turn as she is whisked away to unfamiliar realms. Amidst a cosmic battle of epic proportions between celestial beings and malevolent demons, Sami discovers her hidden extraordinary abilities. Hunted by the demons craving to suppress her immense power, Sami faces the ultimate question: can she find a way back to her ordinary life, or is the fate of the universe at stake?