Taiwanese YouTuber Fan stumbles upon a mysterious live video about vanished school bullies, which triggers his journey to Japan in search of Hitomi. With the assistance of his friend Yang, they locate her, but their discovery leads to them becoming fugitives due to new disappearances.
Hitomi, who has never slept since birth, falls into a coma, causing things and people around her to vanish. As Fan and Yang protect her, suppressed feelings between them begin to surface. As Hitomi’s sleepiness intensifies, posing a threat to the world, Yang hands her over to the authorities. Determined to rescue her alone, Fan learns she’s from another planet. He faces a difficult choice: save his home and Yang by sacrificing Hitomi or help her return to her world, risking the disappearance of everything.