3 years after the D-reaper tried to destroy both realities, Takato and the other Tamers were warped back to the digital world.
Their arrival was a bit jarring for the tamers as they didnt come of their own free will. Calumon pulls them in. But it isnt quite Calumon. A remnant of the Reaper took rest inside of the small digimon before its destruction. After Calumon releases the Matrix, the reaper takes hold in side of him, causing him to lose his aiblity to evolve, but no one is aware of this.
As the reaper grows stronger within him, Calumon slowly fades until the reaper takes over and Calumon Digivolves. With his last bit of strength he summons the original tamers to help with new menace.
This mutated Calumon wrecks havoc in the digital world. Guilmon and the gang do everything they can to stop it. When takato and crew show up their digivices change and thier digimon instantly digivolve. BUt the Mutated Calumon provess too powerful. And Jeri is taken by the Mutated Calumon as it remembers the darkness in Jeri.
Takato and crew go on a rescue mission to get back Jeri. She is being tortured by the mutant to release her darkness but she doesnt give in as she knows her friends will come save her. An all out attack insues and the tamers are beaten back by the sheer power of the Mutant. Impmon doesnt give up and Digivolves to Beelzemon without the help of Ai and Makato. Beelzemon gets beaten back in one blast. As the mutant sees Jeri is not going to help in the manner it thought, it turns its attack to her. Beelzemon pleads for Ai and Makatos help they awaken a wish for ultimate power. A white light beams from their digivice through Beelzemon and into the mutant. This causes a super evolution in Beelzemon and he digivolves to REDEEMON. His glowing White wings shield the knocked out tamers and their digimon.
Redeemon and the mutant go head to head, and the mutant is starting to loose the battle when he aims again for Jeri. Redeemon puts himself between the matants attack and Jeri thus dying in the process. Before he dies, Redeemon goes over to Jeri and released a Digiegg from his chest. Telling her that this is HER digiegg.
The destruction of Redeemons body causes a wave of power knocking Jeri unconscious, and deleting the mutant. Calumon falls from the sky and is caught by Takato, who is the only one awake to witness Redeemon's sacrifice.
Calumon wakes up with a slight smile and the tamers are transported to the digital world. They all wake up the following day with only different bits and pieces of what happened. its as if they all had a different dream... Only Takato remembers it all. And regrets the loss of his friend impmon.