The war against the impending Web has been won, but the war for Mainframe is far from over. In Guardian Bob's absence, Megabyte has successfully taken over the city while Dot, Enzo, Phong, AndrAIa and Mouse take refuge in the Principal Office. Enzo's new Guardian protocol is Mainframe's only hope. Unfortunately, as a young sprite he has a lot to learn and is left no choice but to ride the games into the Web. Enzo adopts the moniker of Matrix, searching the Web with AndrAIa to bring back Bob and save Mainframe from total system shutdown!

Originally released as two feature-length films (The Rise Of Daemon and My Two Bobs), Season Four chronicles the full Web takeover of Super Virus Daemon and raises the question of what to do with two Bobs. We discover the truth about the creation of Lost Angles, the origin of Megabyte and Hexadecimal and what Bob is really doing in Mainframe.