The main character, who came to work as a short-term part-timer at a research facility that deals with heteromorphic species, made eye contact with a man placed in a culture pod. It is said that the monster disguises itself as a human and eats and kills the women it lures. The main character, who had a distrust of the facility, one day passed a man who had the same face as that monster. After following the man down into the basement of the facility, the protagonist is attacked by countless tentacles in a mysterious room.