While trying to download instructions into Yoki’s brain from Chip, Jack accidentally presses the wrong switch and the pair do a data brain swap instead. Now Chip thinks she’s Yoki and Yoki thinks he’s Chip. And the only device that can fix the problem is now stuck to a fleeing bat’s antennae. Jack has to team up with Chip (who thinks she’s Yoki) while the kids try to keep a suspicious mom away from Yoki (who thinks he’s Chip).