As Harris' experiment at the science fair goes haywire with potentially explosive consequences, the school's MECH-X4 fan club threatens to uncover Ryan's secret identity.
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.
Ryan finally gets a lead on his biological father, Randall, only to find him in mortal danger and must race against time (and a collapsing mountain) to save him.
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.