5 children receive strange messages on their cell phones that lead them to a train that takes them to the "Digital World"; a strange world filled with bizzare creatures called "Digimon". These children have been sent there to stop an evil Digimon named Cherubimon from completely annihilating the planet of all its inhabitants. In order to accomplish this, the 5 children must locate their "spirits", which will evolve them into the Legendary Warrior Digimon. Unfortunately for them Cherubimon has ordered his servants to stop the kids from finishing the mission; eventually the children will have to fight Cherubimon's forces in order to save the planet.
A group of 12-year-old fans of the Digimon card game meet their own Digimon friends and start to duel "bio-emerging" Digimon who cross the barrier between the information network and their world.
While at summer camp, seven kids are transported to a strange digital world. In this new world they make friends with creatures that call themselves Digimon who were born to defend their world from various evil forces.
Masaru, is a second year Junior High student, and is undefeated in battle, He meets the Digital Monster Agumon, who has escaped from DATS, a secret government organization. Despite terrible first impressions, the two become best friends by talking with their "fists". With others, Masaru and Agumon work to investigate various incidents involving the Digital World and Digital Monsters, to try and get to the bottom of things.