The real world and the digital world are originally maintained in balance by the "World Tree" system, but an ancient force derived from human negative emotions and the dark side of the Internet - the "Entropy Silent Beast" (the force of the final BOSS) is trying to swallow the data of the two worlds, causing the digital world to collapse and invade reality. The selected children are the pure-minded ones selected by the emergency protocol activated by the "World Tree". Their digital device "D-Link" is the key to connection and evolution.
