When an ooze-based zombie virus infects the students of East Bay City High, Harris must team up with his science rival Veracity to figure out an antidote to save their school.
When a new monster creates a city-wide blackout and disables the MECH-X4, the team must figure out how to get the robot working again to stop the beast from completing its mission.
A super-charged Mech-X4 races around the world to defeat Traeger's beasts, and Ryan must make one of his toughest decisions yet: save his friend or save the world?