Grundy tries to surprise the ANTs by dressing up as Santa Claus, but things take a turn when the backup computer locks the kids in the school.
Chyna and the ANTs face a crisis when zPhone defects provoke complaints. Z-Tech's stock plummets. Zoltan fears he'll have to close the school, until a mystery buyer takes it over.
Dixon breaks up with Olive for another girl and Chyna is there to pick up the pieces. Lexi tricks Angus and Fletcher into hiding in her closet.