A year after the events of the first season, a virus Digimon called Diaboromon appears and starts attacking the Internet. The children and their Digimon unite once more in order to prevent him from destroying every communications network on the planet.
Digimon Adventure: Our War Game! (Japanese: デジモンアドベンチャー ぼくらのウォーゲーム!, Hepburn: Dejimon Adobenchā: Bokura no Wō Gēmu!), also known as Digimon Adventure: Children's War Game! is a 2000 Japanese anime short film directed by Mamoru Hosoda and produced by Toei Animation. A part of the Digimon media franchise, Our War Game is a sequel to the 1999 anime television series Digimon Adventure, and is the second Digimon film overall. The film premiered in Japan on March 4, 2000 as part of the Toei Anime Fair (being screened alongside One Piece); in North America, portions of Our War Game were included in the 2000 compilation film Digimon: The Movie. Hosoda has cited Our War Game! as a major influence on his 2009 film Summer Wars, with critics noting numerous similarities between the films.