本劇為 1989-1993 年間播出之科幻影集的重啟，設定在原劇 30 年後的世界。

Three computer-savvy kids, Naoto, Yuka and Ippei created their own videogame superhero, but then discover it possessed by an inter-dimensional police officer, Gridman. Pursuing an evil program called Kahn Digifer, he merges with Naoto and fights Kahn Digifer's digitized monsters in order to prevent the computerized demon from wreaking havoc on the Human World.

Cybernetics engineer Fred Stiller uncovers a massive corporate conspiracy involving a virtual reality computer project.