After the events of 02, everything is finally getting back to normal. That is, until a strangely familiar icon starts showing up on computer systems around the Japan. And not just computer systems... TVs, mobile phones, video games; anything with a screen with online capabilities. And this icon seems to be looking for somone... Yagami Taichi, and Ishida Yamato, who defeated it several years before. Yes, it turns out that this jellyfish digimon is in fact Diablomon, the Virus-type Digimon that was defeated in the second movie. But this time, he's learned to make himself physical, and is sending thousands of copies of himself into the real world. Koushiro and Ken devise a plan to rid the world of the virus once and for all, but it'll take the help of all the Destined, past and present. Once again, it's a race against time to put a stop to Diablomon's plot... but even that is cloaked in shadow. Will the revival of Omegamon be enough to stop Diablomon a second time, or will the millions of copies prove enough of a power boost to shrug off the Digimon Champion of Justice? Of course, he hasn't seen the new breed of Chosen, nor the new techniques. It's a fight to the finish, with the destruction of Tokyo resting on the line. (Source: AniDB)

This movie takes place after the Adventure series ends. It begins when a new Digimon Egg is found on the internet, and manages to penetrate into almost every computer system in Japan. When the egg hatches, it's identified as a new kind of Digimon, a Virus-type. It sustains itself by eating data from various system, and starts wreaking havok in Japan. As it consumes more and more data, it continues to evolve. And Taichi and Koushiro decide it's time to stop it. They're off, sending Agumon and Tentomon through the internet to fight off this new enemy. But, with the Virus controlling systems like the American military, all too soon, this digital menace may become all too real. Calling in the help of Yamato and Takeru, they hope that they can stop what's already begun, and maybe save this world a second time. (Source: AniDB)

Taichi Yagami and his friends have moved on to junior high, but by that time, they have lost contact with their Digimon partners. Taichi is therefore surprised to suddenly receive a distress call summoning him to the Digital World. Once there, he learns that Digimon are living in fear of the mysterious Digimon Emperor, who is somehow suppressing their ability to Digivolve! In the real world, Hikari Yagami and Takeru Takaishi reunite in the same fifth grade class. They share three schoolmates: Daisuke Motomiya, who reminds them both of Taichi; Miyako Inoue, a technical wizard; and Iori Hida, Miyako's neighbor. When these three children receive D-3 Digivices, they—along with Hikari and Takeru, who still possess their own original Digivices—comprise the new generation of Chosen Children who must save the world once again. With the power of the Armored Digi-Eggs, they must thwart the Digimon Emperor's plans to spread his influence over the entire Digital World.

In the year 2020, technology is everywhere. Every digital device around the world is connected by a singular network where data travels. Unbeknownst to humans, this network has become home to life forms known as Digimon. Fifth-grader Taichi Yagami is preparing for summer camp when strange occurrences begin in Tokyo; certain electronic systems have started going haywire. When he discovers that his sister and mother are trapped on an unstoppable train, he rushes to the nearby station. Suddenly, Taichi is transported to another world where he meets a strange creature by the name of Agumon, who somehow already knows his name. Taichi also receives a strange device called a Digivice, which allows him to communicate with the undigitized world. Taichi discovers he is in the Network, and virus-like Digimon are attacking the areas that maintain Tokyo’s electronic systems. It is up to Taichi and his new partner Agumon to stop these cyberattacks before the whole world is threatened by the actions of mischievous Digimon.