An architect disrupted the school during construction and turned it into supernatural entities. Years later, an augmented game involving dark rituals happens when a group of students unleash a swarm of evil spirits into the world.

Yu-Hsuan lost her boyfriend Chuan-Sheng in plane accident. She then discovered Chuan-Sheng and a girl look alike Yu-Hsuan both appeared in a photo taken in 1998. Accidentally, she had backed to 1998 and met a boy looked alike Chuan-Sheng.