The kids and their Digimon partners quickly become inseparable, and the little creatures guide their human friends through the wondrous DigiWorld, protecting them from the hordes of evil Digimon.

The group soon discovers that some of the giant Digimon they encounter are not evil Digimon but good Digimon gone bad. A dark power is corrupting even the most gentle of Digimon by embedding Black Gears into them, turning them into vicious monsters. Creating chaos and destruction wherever it goes, the evil power threatens all of DigiWorld.

As they try to find their way back home, the seven kids are drawn further and further into the mystery. Through teamwork and trust, they help their newfound Digimon friends digivolve from "monsters in training" to giant champions that must save the DigiWorld from the powerful evil intent on destroying it. With an unbreakable bond between them, the kids and their Digimon companions embark on the adventure of a lifetime!