Taichi passed through the cave in order to meet Yamato, and after they leaving the cave, Tokyo appeared in front of him, and it looks like nothing had happened there.
When they want to back home, strange things happened one after another. They cannot leave Shibuya. They found that it is a copy of Tokyo made by Eyesmon from computer data.
Taichi think that Eyesmon is the culprit of the Tokyo blackout.