For the Pokemon World, the existence of humans has never been unusual. While it is well known they exist in another realm and can only be brought to the Pokemon World when there is a crisis at hand, the humans often stay, preferring the lives they have with their Pokemon partners rather than the lives they led in the human world. Every time a disaster strikes, the Pokemon never fear, because a human will be there to save the day.
Until, one day, they don't.
Now, three humans from different times cross paths, all with one goal, to rewrite history and save the world from the failure that caused it all.