Megabyte disguises himself as an upgrade to infiltrate the core of Mainframe.

A code master from the Net is searching Mainframe for a code master by the name of Tallon. It seems crotchety old Mr.Pearson might have some information to share.

Megabyte's attempt to siphon energy from Mainframe causes two game cubes to overlap and trap him and Bob together to fight the User.

Megabyte's continued attempts to steal Mainframe's energy lands Bob and Enzo in a corrupted Mad Max gamecube. With all of Mainframe's energy at risk for nullification, Bob must keep both the Users and the sprites from winning the game.

Hexadecimal breaks into the Principal Office Archives and tampers with the paint program, using all of Mainframe as her canvas.

With no other young sprites in Mainframe, Enzo is lonely. When an aquatic game drops on the diner, Enzo makes friends with a game sprite named AndrAla.

Something horrible comes through Hexadecimal's looking glass, mutating her into a black supervirus. The nulls launch an offensive on her, creating a gigantic null monster.

The entity that came through the looking glass attacks and corrupts Megabyte, who then merges with Hexadecimal, transforming the two of them into Gigabyte, the next generation of virus.

Bob is on the case when a string of abductions claim Al's waiter and Dot. Special CGI agents Fax Modem and Data Nully arrive to investigate.

Bob, Dot and Mouse must team up with Megabyte and Hexadecimal to save Mainframe from the attacking Web. Their attempt to close the portal to Mainframe ends with Bob being shot into the web.