The film is a suspense thriller that tells the story of people's desperate struggle to fight against "that thing" that was released from the seal. The world was thrown into chaos because of "that thing" that was released from the seal, and everyone had to fight hard for survival. The number "8" mentioned in the title also implies perfection, immortality, and rebirth. Kim Yoo-jung will play the suspenseful character Ailan in the film, who exudes a gloomy atmosphere.