While at camp, Tai, Matt, Sora, Izzy, Mimi, Joe, and T.K. come across seven Digivices and are transported to a strange Digital World where they make friends with creatures called Digimon who claim to be their chosen partners.

The kids come across a beach with numerous phone booths, but none of them seem to work.

The kids run away from a Monochromon battle. They come across a trolley car on a small island and decide to spend the night in it, until they are attacked by a Seadramon.

The kids come to a Yokomon village to rest for the evening until a Meramon attacks.

The kids stumble upon a factory where they find an Andromon in trouble.

While escaping the Numemon who attacked the group in the sewers on their way out of the factory, the kids are split up and Mimi ends up in Toy Town.

Tai and Matt argue whether they should climb Infinity Mountain. Joe and Gomamon decide to climb the mountain by themselves. While on the mountain, they are attacked by a Unimon.

The kids meet the ruler of File Island, Devimon, the controller of the Black Gears.

Tai and Agumon land on a snow-covered island and are forced to defeat a Frigimon.

Mimi and Palmon escape Sukamon and Chuumon and cross over to the next island where Izzy and Tentomon landed, but end up getting lost in a labyrinth and attacked by Centarumon.

Piedmon begins to turn the kids and Digimon into key chains. After nearly all allies are stopped, T.K. realizes the hope his brother Matt has for him, making Angemon digivolve into MagnaAngemon.

Piedmon and WarGreymon battle, although WarGreymon is no match for him. Matt confronts his inner darkness, as does Sora. All of the DigiDestined, except Mimi, reunite.

Joe goes off on his own to find Matt. Angewomon faces off against LadyDevimon, one of Piedmon's servants. After LadyDevimon's defeat, Piedmon tries to approach the group.

Gennai urges the group to travel to Server to defeat another enemy. Gennai also tells about Crests that will allow Digimon to digivolve further. The kids build a raft and leave File Island and are taken by Whamon to where the Crests are hidden.

The kids arrive in a Koromon village where they are confronted by Etemon. He uses his Dark Network to prevent the Digimon from digivolving and then traps the group inside a cave where they discover their first Crest, Tai's Crest of Courage.

While traveling in the desert the group is trapped by Etemon in a coliseum.

Etemon returns as MetalEtemon to take revenge on the DigiDestined. Joe and Mimi rescue Ogremon, who was injured when Woodmon attacked him. The others get inside of Puppetmon's mansion with the help of two of his playmates.

Tensions run high as a fight breaks out between Matt and Tai as well as their respective Digimon partners. Kari's body is taken over suddenly by a strange entity, to explain why the children were chosen.

Matt is tricked by Cherrymon, a minion of Puppetmon, into believing that Tai is his enemy. Meanwhile, Puppetmon's platoon of Garbagemon are handled by Lillymon and MetalGreymon.

Whamon is killed trying to help WarGreymon, who finally manages to defeat MetalSeadramon. The kids then go into a forest were they are continually taunted by Puppetmon, who uses toys to move them around.

Just as the kids are about to be destroyed by MetalSeadramon, Whamon comes to their rescue and they flee to the bottom of the ocean. However, when MetalSedramon catches up to them, a battle begins.

The kids manage to escape MetalSeadramon's minion, Scorpiomon. They try to escape by sea, but are immediately stopped by MetalSeadramon.

Matt, Gabumon, Joe, and Gomamon are forced to work at Digitamamon's diner to pay off a meal.

Izzy is trapped in Vademon's pocket dimension and robbed of his curiosity. DemiDevimon attempts to buy Izzy's Crest from Vademon and, in the confusion, Izzy recovers his Crest and his curiosity.

Joe and Tai find Mimi being treated like a princess at a palace. Sora convinces her to sing and awaken ShogunGekomom, but ShogunGekomom attacks the kids.