During a routine check of the WOOHP Containment Facility, Jerry encounters a most unexpected event - when Dr. Gray uses a homemade gadget to switch his body with Jerry's -- allowing him to escape WOOHP! And now that he's free, he's determined to use all the resources that WOOHP has to offer to help him achieve his ultimate goal: switching the bodies of all of the humans on Earth so that they can learn to walk in each other shoes! And as chaos begins to erupt around the planet, Sam, Clover and Alex start to realize that something is definitely up. It's up to the girls - with some help from Jerry's Mum, who is the first one to realize that her son isn't acting at all like himself - to not only stop Dr. Gray and save the world, but to save Jerry as well! In a b-story, Jerry's Mum comes out of retirement, becoming a spy once again!