Certain Digimon have left File City and scattered themselves across File Island, and some of them have lost their ability to speak. Players take on the role of a talented young boy who finds Digimon, raises and trains them, and attempts to return them to the City. Digimon start off as innocent babies and over time, they grow and "digivolve" into bigger and better digital monsters. This Digivolution depends very much on how a player raises his Digimon.