Summary:The digital world was created from data flowing over the internet into the real world. Creatures called Digimon live in the digital world. They have the ability to evolve into stronger creatures with a technique called digivolving, but this had a negative effect on the future. Some Digimon failed to digivolve while some joined together and formed a dark Digimon named Apocalymon. His existence warped the digital world and created other evil Digimon. Apocalymon's existence is the beginning of the Digimon adventure.