Approximately six years ago, Taichi "Tai" Kamiya and his sister Hikari "Kari" Kamiya were meeting the rest of their team of children chosen to save the world. Though they had done so; Tai, Kari, Yamato "Matt" Ishida, Sora Takenouchi, Mimi Tachikawa, Koushiro "Izzi" Izumi, Takeru "TK" Takaishi, and Joe Kido had gone through a huge ordeal, eventually defeating the terrible digimon Apocylamon. Meanwhile, many years into the future, Yolei Inoue was meeting her team. However, only three other members made it; Davis Motomiya, Cody Hida, and Ken Ichijouji. Like Tai's team, they too had fought a slew of digimon, the worst being MaloMyotismon.
In another dimension, Takato Matsuki, Henry Wong, Suzie Wong, Ryo Akiyama, Rika Nonaka, Jeri Kato, Ai Issuree, Mako Issuree, Kenta Kitigawa, and Kazu Shiba were meeting to return to the Digital World and see their partners.
Another world saw Takuya Kanbara meeting with his friends and teammates; Tommy Himi, Zoe Orimoto, Junpei "JP" Shimiyama, Koji Minamoto, and Koichi Kimura in the train station where they had started and ended their own adventure.
In yet another world; Thomas H. Nostein, Homer Yushima, Yoshino "Yoshi" Fujieda, Kristy Damon, Spencer Damon, Miki Kurosaki, Megumi Shirikawa, and Keenan Crier were standing in front of the building that had served as their headquarters. In their Digital Plane, their leader, Marcus Damon sat in front of a large tree and thought about the people he had left behind.
In the next instant, all five teams along with a boy known as Willis Brenan were brought to one of the Digital Worlds where they met each other and were tasked with protecting another world and another Digital World. Most of the kids were given the task of masquerading as students at a school of magic while they protected the weak spot nearby from harmful Digimon. No sooner had they been sent than the group began to encounter enemies. However, they tried to keep their presence as Digidestined a secret until one boy changed all that.
The boy, Harry Potter was the subject of much press for being the only one to survive the Killing Curse of the evil Dark Lord, Voldermort. One night, he learned of the Digidestined and was changed. At the end of the change, Harry died only to be reborn a being of fire. Eventually, several other students and even a teacher became teammates of the Digidestined. Under Harry's command, this coalition secretly protected the school from five shadow figures known simply as "Shadows." Subgroups were created but even so, the world at large knew nothing of their mission until this very year.
Shortly after Harry, his team, Dumbledore's Army, and his cousin Dudley fought Voldermort at the Ministry of Magic, a shaky peace descended. It was summer and many thought only about summer sports. For those who were students in the school however, there were other things to worry about, such as homework.
