Takeshi Saito, a new security guard at the advanced amusement park Fantasien, encounters trouble when he inadvertently damages a guidance display during his shift. He and Tamami are then summoned to meet with their supervisor, Ms. Amano, to address the mishap. Meanwhile, Makoto Kashiwara is assigned to fix the broken equipment, only to stumble upon a concealed secret that transforms an ordinary day into a labyrinth of mystery and peril.