Taichi Yagami and his friends have advanced to junior high, but by then, they have lost contact with their Digimon partners. Consequently, Taichi is surprised to suddenly receive a distress call summoning him to the Digital World. Upon arrival, he discovers 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 original Digivices—form the new generation of "Chosen Children" who must save the world once again. Using the power of the Armored Digi-Eggs, they must thwart the Digimon Emperor's plans to spread his influence over the entire Digital World.