Yuta pleads for Meika's help in saving humanity from destruction. The two begin "Operation Peacemaker," but to make it work, Yuta must defend Koraikan by himself.

Nothing.

Gallantmon faces Beelzemon in a tough one-on-one battle. During the battle, Gallantmon destroys Behemoth and rescues Kazu and Kenta which causes them to realize that Takato has merged with Guilmon. Meanwhile, the Sovereign sends his last Deva Chatsuramon to destroy Lopmon for being a traitor. Chatsuramon goes to kill Suzie and Lopmon, but Terriermon takes the hit, saving them and mortally injuring him. Before Chatsuramon can do more, Gallantmon destroys him, taking out the last Deva, but Beelzemon absorbs his data which makes him stronger. Beelzemon beats down Gallantmon and is about to kill him, but Guardromon and Kazu intervene and buy Gallantmon enough time to recover. Beelzemon's attacks do no damage to him after that and he runs out of ammo. Once that's done, Gallantmon blasts Beelzemon with his Shield of the Just, finally defeating him. Gallantmon goes to kill him, but Jeri stops him as it won't bring Leomon back. Beelzemon remembers his own Tamers and leaves regretting his actions.

With the unfortunate help of dark digivolution Guilmon digivolves into Megidramon. Megidramon battles Beezlemon and almost has him killed but Makuramon comes to confront Beezlemon on how useless his digivolution was. Beezlemon kills Makuramon and breaks free. He kicks Megidramon at his weak point, the chest. He reverts back to Guilmon. Takato goes through deep sorrow and reaffirms his friendship with his Digimon. After making a wish that he could fight, Takato and Guilmon Biomerge to become Gallantmon!

Takato is depressed after Henry and Rika have previous commitments and can't go Digimon patrolling, but he feels better when he goes with Guilmon to play with his school friends. But soon the Snake Deva Digimon, Sandiramon, attacks leaving Rika and Henry to fight it on their own, until Impmon helps out and tells Takato they need him.

Ken runs away from home, preferring to remain in the Digital World instead. He captures Agumon, and forces him to dark digivolve, resulting in the uncontrollable SkullGreymon.

Davis' soccer team is playing against genius Ken Ichijouji's team. The DigiDestined later find out that he actually is the Digimon Emperor.

After trying to destroy a control spire located in a city, Kari is separated from the rest of the group. Davis and T.K. return to rescue her. Kari eventually manages to free Andromon from the dark ring's control.

Mimi and the new DigiDestined have a picnic in the Digital World. But Mimi falls into a hole and, along with Yolei, is separated from the rest of the DigiDestined. They meet Palmon, but are then attacked by the Roachmon brothers, Gekomon and Otamamon, who are under the Digimon Emperor's control.

The six DigiDestined, assisted by DigiDestined all over the world and Oikawa's gathered children, destroy MaloMyotismon. Oikawa is left dying in the dream dimension and uses the power of the dimension to help restore the Digital World to its original state. Twenty-five years later, when everyone in the Real World has a Digimon partner, both groups of DigiDestined are grown and their children now hold the responsibility of protecting the worlds.

Gomamon is injured and left for dead by the Digimon Emperor. Joe goes with the new DigiDestined to save him. But soon after they come into the digital world, Cody gets hurt, and Joe stays to help him.

MaloMyotismon tempts the DigiDestined with illusions of their dreams coming true, but Davis, whose dream was that ExVeemon could grow more powerful to defeat the villain, guides them out. The others follow his example, causing the Digimon to evolve into all their forms at once.

Oikawa and the children infected with the Dark Spores try to go to the Digital World, but, due to BlackWarGreymon's sealing of the gate, travel to a different world, where MaloMyotismon, who had hidden within Oikawa ever since his defeat, makes his appearance.

One of the children's Dark Spores grows into a Dark Flower, which is harvested by Oikawa despite the DigiDestined's best efforts to stop him. Cody's grandfather tries to convince Oikawa to give up villainy, but fails. Before Oikawa can kill him, however, BlackWarGreymon takes the fatal blast. The dying mega uses the last remnants of power to seal the digital gate at Highton View Terrace.

BlackWarGreymon confronts Oikawa, who tells him the truth about his creation. The digimon tries to destroy Oikawa, but is stopped by both WarGreymon (which was the result of another power boost Agumon received from Azulongmon) and Imperialdramon Fighter Mode. After a fierce battle, they plead with BlackWarGreymon to befriend them.

Oikawa, having no more use for Ken, attempts to hand him off to Daemon, however, Davis intervenes. The other DigiDestined arrive, and with their help, Ken is able to open a gate to the Dark Ocean and send Daemon through it.

Yukio Oikawa and his cronies kidnap Ken, and use his Dark Spore to create new ones to implant in gathered children. Meanwhile, Daemon's servants engage the DigiDestined, and, in order to win, the DigiDestined must kill both of them.