Hexadecimal is attacked by something that comes through her looking-glass and becomes something ‘different’. The nulls, worm-like creatures that were former sprites who mostly inhabit Lost Angles and are normally controlled by Hex, suddenly engulf the viral and end up creating a huge monster, made entirely out of nulls – Nullzilla! Bob, Dot, Enzo, Frisket and Mike the TV have to don their special outfits and somehow get their special ‘bug’ ships to join together and create a giant robot, capable of stopping Nullzilla! But can they get the darn thing to work in time to save Mainframe?!?!