The family travels everywhere in the United States, from Texas to a prairie town, and eventually has been moved to every geographic location around the world possible, with the single exception of Australia – thus the FBI (who by this time are getting absolutely fed up of having to constantly relocate the Parkers, and all because the sisters can't keep their mouths shut) send them to live in Sydney, where they are given the aliases Maddie and Abby. The girls have much trouble at first, especially fitting in with their peers. Two assassins named Mac and Sidney are sent after them after discovering their location by breaking into the FBI office.
The Parker family embarks on a nationwide journey across the United States before being relocated to various locations worldwide, excluding Australia. The FBI, exasperated by the sisters' propensity for secrecy, assigns them new identities as Maddie and Abby in Sydney. Nevertheless, the girls face significant challenges in adjusting to their new surroundings.