A virtual world was created by the present-day network called the "Digital World". The "Digital Monster", which is a digital life object, was born, and the host computer "Yggdrasil" managedthe different Digital World areas.

However, it developed the "X-Program" of fear to eliminate all Digimon in the old world and develop a new Digital World for only certain Digimon... Now, the greatest crisis ever approaches the Digital World!