In 2997, many children from all over the world were stunned by a terrible disease. But all the children met in their dreams as if it was another dimension that connected their minds together. And in this dream dimension, everyone is free to adventure to different lands and in the year 3002, the outside world has been invaded by demons from another dimension. And the world finds that a child has awakened from a long slumber and the children have returned with the power to save the world.