After seeing Meicoomon's abrupt transformation and killing of Leomon, Agumon and the other Digimon are kept isolated in Koushiro's office in order to prevent them from infection, but signs of infection begin to appear in Patamon.

The DigiDestined have a good time in a theme park without Joe because he wants to study for his exams, while another infected Digimon, Ogremon, attacks Odaiba. Would Joe accept his responsibilities as a DigiDestined before it's too late?

This side of the series happens before the events of the first game and acts as a prequel to the second game.

In a world of war between bears and humans, a young schoolgirl is sent into an adventure quest to find the origin of this conflict.