Kim Possible is a high-school cheerleader and world-famous crime fighter, and Ron Stoppable is her faithful sidekick and best friend, who has a pet naked mole-rat named Rufus. The film begins at the start of a new school year, which Ron has good hopes for, until he finds out he's moving away to Norway for his mother's work. Meanwhile, Dr. Drakken, Shego, Duff Killigan, and Monkey Fist team up to steal the Time Monkey idol, a small magic statuette used to travel through time. Kim chases the villains around the globe, but she fails to stop them from stealing the Time Monkey's pieces and activating it.
Kim is visited by a talking mole-rat from the future, a descendant of Rufus named Rufus 3000, who gives Kim a time-travel device and explains that the "Supreme One" has taken over the world in the future and she is the only one that can prevent it. Meanwhile, Drakken, Killigan, and Monkey Fist turn themselves into children and travel back in time to Kim's first day in pre-school in order to discourage her from becoming a crime-fighter. Posing as her schoolmates, the villains try to bully the four-year-old Kim, but she fights them off and becomes friends with four-year-old Ron, while the high-school-age Kim arrives through a time portal to fight Shego.
Foiled, the villains turn back into adults and escape forward in time, to the day of Kim and Ron's first adventure. Monkey Fist goes into the ancient past and retrieves a giant stone gorilla to attack pre-teen Kim and Ron, but they destroy it with the help of their present-day selves. During the fight, Shego is visited by herself from the future, who urges her to steal the Time Monkey. Drakken, Killigan, and Monkey Fist are arrested, but Shego escapes with the Time Monkey into the future. Rufus 3000 arrives and reveals to Kim that the Supreme One is Shego and not Drakken as she originally thought. Kim then activates a portal and she, Ron, Rufus, and Rufus 3000 go twenty years into the future to stop her.
In the future, Shego has become dictator of the world and enslaved the global population. Kim and Ron are captured and sent to their old high school to be brainwashed into obedience, but they are rescued by Kim's younger twin brothers, Tim and Jim, along with Rufus 3000 and an army of naked mole-rats. Kim and Ron are taken to the secret headquarters of the resistance movement, whose leader turns out to be their old computer guru Wade Load. Together, they sneak into Shego's palace, where they fight their way past Monkey Fist and Killigan (now a cyborg) to Shego's throne room where she keeps the Time Monkey. Shego is waiting for them however, and has Kim engage in battle with Drakken, who has undergone genetic enhancements to become super-humanly strong. Kim's old friend Monique, also a part of the resistance, breaks into the palace to assist her, but the two are eventually defeated while Jim, Tim, Wade, and Rufus 3000 are captured by Killigan and Monkey Fist.
Shego reveals that she separated Kim and Ron by making money in the dot-com bubble, buying the company that Ron's mother worked for and having her transferred to Norway, her reason being that while together, Kim and Ron actually made a decent team, but if they were apart, they couldn't stop her. Angered at Shego for having made him move to Norway, Ron overpowers Drakken and accidentally destroys the Time Monkey, undoing all the effects the idol had done to the time stream. This causes Kim, Ron, and Rufus to float through a time gate and travel back to the first scene of the film, at the end of Kim and Ron's first day of school at the beginning of the film. At the moment when the first time disturbance occurred, a wave of temporal distortion washes over Kim and Ron. When it passes, Shego's future is erased and the world is restored to its original state, the two teens having lost all memory of the film's events.
The film was aired on November 28, 2003, between the 13th and the 15th episode of the second season of Kim Possible. In the re-runs, the film was usually split in three episodes, and serves as episodes 26, 27 and 28 of season 2. It was released on DVD on March 16, 2004 in the U.S. (Region 1) [1] and on March 14, 2005 in the U.K. (Region 2).[2] On Disney+, the film is only available as three episodes.
