4 Months have passed since the defeat of Lucemon and the world is at peace. But suddenly the gang learn that there was far large as then they knew. Join by new friends and allies they now must face the evils of the past in a world of bloody evolution.
The world of Remnant is constantly attacked by creatures called Grimm, which are relentless and endless. But there exists a world parallel to Remnant, a world entirely made of data. In this world exist monsters that make the Grimm look like house pets. At the start of summer vacation, a small group of kids are transported to this world to stop a danger that threatens both worlds.