The year is 2100 and a global computer network has linked the world together. The younger generation has embraced this technological age, becoming Web Divers who delve into the digital paradise known as Magical Gate. But their fun is short-lived when a dangerous computer virus threatens to obliterate their virtual reality. Despite the mobilization of Web Knights to protect the kids, the virus corrupts them all, except for Gladion. In a race against time, Gladion seeks out the help of Kaito Yuki, a fourth-grade Web Diver, to prevent total destruction.