One day, the protagonist, Taichi Yagami, wandered into the network world called Network Space, where he met his partner Digimon Agumon, and together they stopped a runaway network incident that hit Tokyo. The incident was successfully solved, but Taichi came back to the real world from the network space. "Was it all a dream? However, Taichi's Digivice, his bond with Agumon, was still in his hand. The next day at dawn, Taichi and his friends, including Mitsuro Izumi and his classmates Sora Takenouchi, Yamato Ishida, Mimi Tachikawa, and Takeru Kido, head to the Digital World to find out if Digimon are the cause of a new crisis: a massive blackout across Tokyo.