Falling.In Aomori, Japan, plutonium is stolen from a nuclear fuel reprocessing facility and one of the young perpetrators sprays the letters "VON" at the scene in red paint. Six months later, the two teenagers, who refer to themselves as Nine and Twelve interrupt the student Lisa Mishima's classmates as they bully her, then enroll in her school. A mysterious video is posted on social media by two masked teenagers called Sphinx 1 and 2, threatening a black out and explosion in the Shinjuku area to following day. Demoted detective Shibazaki sees the video, but he does not take it seriously. The next day, while Lisa is in the Tokyo Metropolitan Government Building, the greater Tokyo prefecture loses power and the building is evacuated. With the building free of surveillance, Nine and Twelve place stuffed animals containing incendiary explosives beneath the sprinkler systems. When Twelve is interrupted by Lisa, he gives her one of their stuffed animals and flees the building. He asks Nine to decide whether they should kill her or let her live. His response is to let her decide whether to die or become an accomplice. Lisa does not want to die, so Twelve extracts her as the building crumbles. Twelve returns to their hideout with Lisa who is unharmed but confused.