Tokyo Digital Crisis While preparing for the upcoming school camp, Tai Kamiya is visited by his new neighbor Izzy Izumi when they learn that Tokyo's electronic systems have gone haywire. Realizing that his mother and younger sister, Kari Kamiya, are trapped on an affected runaway train, the two youths run to the nearby station where Tai is suddenly transported to another world inside the internet, encountering a wounded Digimon named Koromon fighting a group of Algomon. A Digivice appears before Tai as Koromon digivolves into Agumon. Another Digivice appears before Izzy and he uses it to inform Tai that the Argomon are responsible for the chaos and Tai and Agumon work together to defeat them. During the fight, Agumon digivolves into Greymon to win the battle, stopping the haywire electronics and saving Tai's family. However, the Argomon take control of the United States Military's network systems. Meanwhile, Tai notices Matt Ishida silently watching the battle from nearby.