Having survived the battle against Millenniummon, Tai and his friends are contacted by Garbagemon, who says that there is something resembling the Crests displayed on their Digivices at the Great Tree of Information.
The DigiDestined are relaxing after having saved the Digital World from destruction at the hands of ZeedMillenniummon, when they get contacted by Garbagemon on Izzy's laptop to explain to them about the Crests. Traveling to a tree full of various technological equipment on Komondomon, they reunite with Garbagemon and Searchmon, and are introduced to Wisemon, the seeker of knowledge, along with several Mekanorimon and the Bokomon pilots of them. Traveling through the tree, they see many Digimon gathering to share information and study it as well. Reaching the heart of the tree, the DigiDestined are shown the Crests that have appeared when their Digimon digivolved. Wisemon explains that the Crests will help prevent the anomalies threatening the Digital World, but they have not fully solved the riddle yet. When the DigiDestined hold their Digivices up to the Crests, they react, allowing Wisemon and Garbagemon to learn some valuable info, and know the DigiDestined are the Digital World's hope for survival from a Great Catastrophe that is to come.
All the events the DigiDestined dealt with previously: the nuclear missile, the fall of the ISS, the cargo ship crisis, Devimon, Millenniummon, all of them were foreshadowing for the Great Catastrophe. Suddenly, two Bucchiemon arrive to warn Wisemon that something is devouring the data they've gathered, including the vital Great Catastrophe data. It is soon revealed to be a Burpmon, a Digimon sent by the Soundbirdmon to eat data. It grows bigger with every data it devours. When it tries to go for the Crest slabs, the DigiDestined move to defend them, save T.K. and Kari when their Digimon can't digivolve, but Burpmon swallows all their attacks, growing bigger. MetalGreymon, Garudamon, and MegaKabuterimon take it outside, but it still continues to grow bigger from swallowing their attacks. Izzy realizes that they can use the garbage data against Burpmon, and aided by the other Ultimate Digimon and the Mekanorimon, they feed Burpmon the garbage data until it can't take anymore and it bursts, destroying it and recovering the data.
However, with the Great Catastrophe looming, the DigiDestined vow to help protect the Digital World and defend it from whatever evil looms on the horizon, and the Crest slabs create compasses on the Digivices to direct the DigiDestined in various directions to find the answers they and Wisemon seek. Izzy and Tentomon stay with Wisemon and Garbagemon while the other DigiDestined set out on their new adventure.
(Numbers indicate order of appearance. Bolded characters are fought by the protagonist(s), and italicized characters feature non-explicitly, e.g. voice, silhouette, image.)