In 1999, due to the abnormal proliferation of data in the digital world, the connection between the digital world and the real world was disrupted. Strange natural phenomena appeared on the earth accordingly: there was no rain in Southeast Asia, and all the ponds dried up; the Middle East was flooded due to continuous heavy rains; and the United States encountered the coldest winter in history. 11-year-old boy Yagami Taichi (voiced by Fujita Yoshiko), and his friends Ishida Yamato (voiced by Kazama Yuto), Takenouchi Sora (voiced by Mizutani Yuko), Izumi Mitsukoro (voiced by Tenjin Arimi), Tachigawa Mimi (voiced by Maeda Ai), Shirodo Jō (voiced by Kikuchi Masami), and Takaishi Takeshi (voiced by Konishi Hiroko) attended a summer camp together, but were accidentally sent to a colorful digital world. There, they got a partner called "Digimon". After entering the digital world, Yagami Taichi and his group encountered the vicious monster Shellmon. When everyone was about to be caught, Taichi's Agumon suddenly evolved into Tyrannosaurus and saved them. What is evolution all about? What is the digital world? Countless mysteries appeared before the chosen children, and the wonderful adventure began...