Takeshi Saito begins his shift as a security guard at the advanced amusement park Fantasien, only for a minor accident to escalate into unexpected trouble. Summoned to the office of his superior Ms. Amano along with Tamami, he awaits the outcome while technician Makoto Kashiwara is dispatched to address the issue on site. As the evening unfolds, Kashiwara's discovery reveals unsettling secrets that draw the group into a tense web of mystery and peril.