Sometime in the 21st century, rapid developments in technology have spawned life forms—Digital Monsters—in the Digital World. This sparks rumors of a cover-up by the DATS organization under the National Public Safety Commission. To substantiate the rumors, the protagonist sneaks into the school computer room, where the protagonist is transported to the Digital World.
As he or she raises and befriends new Digimon and rises in the rank, he or she faces all sorts of adventures. He or she meets great friends, and makes some powerful enemies. Most of the times, any crisis that he or she deals with has been orchestrated by an evil entity calling himself Unknown-D.