After Vicky gets fired for erasing a videotape that the Turners were saving so that they could use it to get their own reality show, she decides to take over Dimmsdale and wage war on Earth. Timmy must now stop her and never return her to babysitting at all costs for life! Unfortunately, every time Timmy wishes she wasn't not the supreme ruler of something, she becomes a supreme ruler of a very most powerful position.
Timmy's parents plan on attending a cinema, leaving Timmy once again, alone with Vicky. But this, time Timmy plans on exposing Vicky as the mean babysitter that she is. He has his fairies poof his parents back to the living room where they view videos of Vicky torturing Timmy in a dungeon or swirly. However, the Turners are too oblivious to the obvious evidence. Luckily, Timmy had anticipated his parents being more stubborn than an alpaca. Thus, he made sure that Vicky taped over his parents home movie video, which Mrs Turner briefly instructed Timmy not to mess with. and was playing right in front of them. The Turners finally realize the truth at last, just Vicky comes in with two electrical saws. At Timmy's request, they fire Vicky. They then decide that Timmy is old enough to take care of himself.
Determined to get a job, Vicky goes all over Dimmsdale, but the best she can do in each job is torture people, resulting in her getting shunned by all her bosses, both literally and figuratively. Eventually, she goes to the mayor and reveals to Chompy the Goat that the mayor indulges himself in eating goat meat, causing the goat to chase him out of his office. Vicky then becomes mayor and takes over Dimmsdale, renaming it Vickyland. Timmy, who is enjoying the time of his life with his godfamily, staying at home while his butler Jensen does his grades at school, soon discovers that getting Vicky out of his life causes her to ruin everyone else's. Wanda proposes that they take fire-breathing battle-rhinos and a lion-cloth warrior to Vicky to depose her. They lose badly. Therefore, Timmy tries wishing that Vicky wasn't the mayor. Unfortunately, Vicky somehow becomes President of the U.S.A. Timmy tries unwishing again, only for Vicky to become a supreme galactic warlord and began attacking Earth with her Star-Destroyer-like warship. To save the Earth, Timmy reluctantly wishes that Vicky was his no longer as babysitter for life, forever again in order to maintain peace.