Meicoomon vanishes into the distorted abyss. Shaken, Taichi and the others search for answers about Meicoomon’s infection. Kōshirō seeks answers from Meiko but she’s lost all emotion. Kōshirō quarantines Agumon and the other Digimon in the office so that the infection can’t spread any further, but Patamon starts to show signs of the illness. Agumon and the others use Hikari’s voice to tell the team about an important secret concerning the Digital World.
The DigiDestined inaugurate their newest members, Meiko Mochizuki and Meicoomon, with a trip to a nearby hot spring. Meanwhile, Joe is becoming more distant, struggling to balance his duty as a DigiDestined and the competitive world of academics. As the damage caused by Alphamon is slowly repaired, another infected Digimon, Ogremon, suddenly appears, and although they only have good intentions, the decisions the DigiDestined make now will have unforeseen consequences.
It’s been six years since that summer adventure when Taichi Yagami and the rest of the DigiDestined crossed over to the Digital World. And nearly three years have passed since the final battle between Hikari Yagami’s group and BelialVamdemon. As the peaceful days passed by, at some point the gate to the Digital World closed. Not even the DigiDestined know what caused this, and time alone continues to pass.
Following Meicoomon’s rampage and the Reboot, Taichi and the others leave behind a distressed Meiko and head to the Digital World. But the partner Digimon that they’ve reunited with have lost their memories. While Sora normally thinks of others even before herself, she now has distrust in her heart. A tearful Meicoomon appears and disappears again. For some reason, she has retained past memories, and is searching for Meiko. Upon seeing Meicoomon, the kids resolve to journey through the Digital World to save her, but a man with the Dark Masters at his command stands in their way. Meanwhile, in the real world, Nishijima receives a notice that Himekawa has disappeared. When he investigates, he learns that she has had a hidden goal behind all her actions thus far.