Digimon Adventure: Bokura no War Game!

Some time after the children's first adventure in the Digital World, a strange Digimon egg appears on the internet and hatches into a virus that consumes data at terrifying speed. As it evolves, computer systems across Japan begin failing, and the damage spreads far beyond ordinary network trouble.

Taichi and Koushirou send Agumon and Tentomon into cyberspace to stop the creature, with Yamato and Takeru joining the fight from afar. But when the virus gains access to military systems, the battle online becomes a race to prevent a catastrophe in the real world.