A mischievous 15-year-old girl living on a space station helps a group of homeless aliens.
In 2015, Zenon Kar is 2 years older but no wiser about the dangers of meddling, but when she shows Nebula how to play a new game, she inadvertently empties out Commander Plank's office and is assigned work detail in the Alien Patrol lab. Worse: the space station is now under command of the military, and General Hammond is assigned to command the station and boots Commander Plank out of his office. Even worse: he assigns Zenon to look after his daughter, who turns out to be her demanding old nemesis Margie, who threatens to have her dad kick Zenon and her family off the space station if Zenon doesn't obey her. Zenon then discovers that her space station is being decommissioned due to damage from Windom and Lutz's plot, so she sneaks down to Earth to try to stop it after she gets a message from aliens who seem to want to meet with Proto Zoa. Margie wants to go too, so she sneaks down to Earth as well but makes it look like Zenon forced her to go with her. With Aunt Judy's help, the girls track down Proto Zoa, who has gone into hiding during a dry spell, and convince him to join them. With Margie, Aunt Judy, Nebula, Orion (the Alien Patrol lab guy), Proto Zoa, and her mom, Zenon goes to meet with the aliens near the moon. Unfortunately, their ship runs out of fuel and they nearly crash to their deaths on the moon, but the aliens show up and rescue them. They turn out to be friendly; communicating with Zenon telepathically, they reveal that they've been lost on space for 3 years and need the ship's navigation charts to get home--just taking them would be rude. When they have the charts they tow the ship back to the space station, where General Hammond refuses to relent, saying the space station is too badly damaged and must be destroyed. Margie stands up to him for once, but it isn't enough until the aliens return and repair the space station as a thank-you gift for helping them. With the space station saved, Commander Plank and General Hammond are assigned to command it together, Aunt Judy marries Plank, and Proto Zoa plays at their wedding, dedicating his new song to Zenon, having been revitalized by the whole experience. The aliens had actually been trying to communicate with Zenon, not Proto Zoa, using the transmission of his old concert to do so. Margie convinces her dad to let her stay, she and Zenon become friends, and attraction builds between Zenon and Orion.—Anonymous
Zenon Kar is now 15, two years older, in the year 2051 and none the wiser about the dangers of meddling, but when she shows Nebula a new game and how to play it, she inadvertently empties out Commander Plank's office and is assigned work detail in the Alien Patrol lab. It is revealed that Greg broke up with Zenon. The space station is now under command of the military and General Hammond is assigned to command the station. Even worse, he assigns Zenon to look after his daughter who turns out to be her old nemesis, Margie, who's demanding and threatens to have her dad kick Zenon and her family off the space station if Zenon doesn't obey her.
Zenon then discovers that her space station is being decommissioned due to damage from the plot by Wyndum and Lutz and sneaks down to Earth to try and stop it after getting a message from aliens that seem to want to meet with Proto Zoa, but Margie sneaks down to Earth as well, making it look like Zenon forced her to come along.
With the help of Aunt Judy, the girls track down Proto Zoa, who has become a recluse due to a combination of writer's block and the feeling he has passed the apex of his career due to his space concert, and convince him to join them. With Margie, Aunt Judy, Nebula, Orion the Alien Patrol lab guy, Proto Zoa and her mother, Zenon goes to meet with the aliens near the Moon. However, their ship runs out of fuel and they nearly crash to their deaths on the Moon, but the aliens show up and rescue them. After Zenon meets the aliens on the Moon, they turn out to be friendly and, communicating with Zenon telepathically, reveal that they have been lost in space for three years and need the ship's navigation charts to get home, thinking it impolite to just take them.
After getting the charts, they then tow the ship back to the space station where General Hammond refuses to relent, correctly pointing out the space station is too dangerous to live on due to the extensive damage from the sabotage. Margie stands up to him for once, but it isn't enough until the aliens return. They push the space station back into orbit and return the previously decommissioned sections as a thank-you gift for helping them. With the space station saved, Commander Plank and General Hammond agree to share command. Plank and Aunt Judy get married at a wedding at which Proto Zoa plays, dedicating his new song to Zenon for his having been revitalized by the whole experience. It's also realized that the aliens were actually trying to communicate with Zenon, not Proto Zoa, and were using the transmission of his old concert to do so. Margie convinces her father to let her stay and she and Zenon become friends while Zenon gets a possible love interest in Orion.
