The “Magical Gate” is an imaginary place constructed inside a cyber world for all kids around the globe.

[SYNOPSIS]
One day, the program goes haywire and a tragedy hits the world as the chaos in the information technology prevails. The minds of the kids who were visiting the Magical Gate have been shut inside due to the freezing of all functions. ln the Diver Land where Kento lives, more than half the kids living there including his own brother Kaito have been captured.
ln spite of intensive efforts by people on the island, the reconstruction of the Magical Gate takes longer than was thought. Meanwhile Kento, who feels helpless for not being able to help Kaito out of the gate,begins to hear voices from an unknown source. “You have got to fight with me.”

The voice was coming from a program called Gladion. Gladion is the only survivor among the Web Knights which are programs created to protect the peace of the Magical Gate. Kento learns from him that mysterious program called Deletloss has invaded the Gate and that all the other Web Knights have been brainwashed by Deletloss. They have become his villain servants who threaten the cyber world.

This evil force of Deletloss must be prevented! A mind that values justice and peace, filled with courage and love is needed to defeat the program! Gladion, the remaining Web Knight has chosen Kento to become that Web Diver and fight against Deletloss. Kento pledges to fight together with Gladion for his brother and friends. Hoping to rescue his friends and bring back peace back to the Magical Gate, Kento begins to dive!