You got sucked into your digivice causing you to be stuck on the digimons giant island called “file city” and you are on a grassy area with a tiny villiage that has 3 digimon in it and a old dude called “jijimon” and he tells you about training and battling digimon, he tells you that hp,mp,attack,defense, and speed all do what you think but training your mons brains helps you control how/ when your digimon uses moves in real time battles. You get a egg and he tell you to go training.