Years ago, five young children befriended five strange creatures. They were, they explained, called digimon, and refugees from a great cataclysm-- but anything else was a blur. They chose to settle down with their friends, their memories of another world lost to them and beyond recovery.
Fifteen years later, forces from the other side begin to emerge. When digimon start to appear in the real world, threatening them and their friends, the refugees may have no choice but to remember, lest they and their friends get thrown into a war that's starting to bleed through the barrier of the worlds.