Connor wants to see the lions and tigers, but Greg and Amaya want to see the butterfly gardens instead. Due to Connor's aquaphobia, he won't join them. Gekko gets mad, but then he finds out that Romeo booby-trapped all the tiles of the museum floor. Then Greg notices the pterodactyl model was missing. Then, the Ninjalinos had decided that they wanted Owlette to be their leader which meant they had betrayed Night Ninja , and Night Ninja went away. By day, Connor, Greg, and Amaya were at Greg's house taking care of Greg's pet lizard, Lionel.
At night, Night Ninja had stolen the sports gear to make his Ninjalinos super strong. Romeo decides to fly the Owl Glider first, and Owlette comes up with a plan to stop him. Connor cheers Greg up about the trip to the science museum, but the teacher said that the trip was cancelled because there's no electricity. Amaya notices a crack on the wall stating that they've been fixing up the museum for months. Will Catboy's newfound greed ensure Luna Girl ruins the concert for good? By day, Connor, Greg, and Amaya get ready to go to the park for Sports Day. Catboy and Gekko tries to get Owlette to give the Giving Owl to Luna Girl but Owlette wants to keep it because it is special to her. By day, Connor, Greg, and Amaya are getting ready for story time in class, but Amaya is obsessed with a comic book heroine named Flossy Flash.
Owlette continues to be hard on Catboy, but she only makes the mission harder. Gekko broke off a piece of Romeo's bulldozer, and makes a great pogo-stick out of it, calling it a Pogo-Dozer. But then, Greg finds a box and it took his voice. By day, Amaya is a bit too excited to ride on a new train ride, and she has some trouble remembering to be patient. But when they're about to go home, the school bus is mysteriously missing.
That company is eOne and they are joined by FrogBox. She forces Catboy to choose between getting wet, and saving the day. Catboy and Gekko tries to get Owlette to give the Giving Owl to Luna Girl, but Owlette wanted to keep it because it is special to her and works too hard to get it back. Then, Romeo zaps Owlette because he wants Owlette to steal more remote controls. By day, Greg and Amaya notice that Connor is going to lead a big parade. Special omulete like objects in their pajamas allow for the group to change into their alter egos. By night, Night Ninja and his Ninjalinos are at the museum with the stolen art, and a giant statue of Night Ninja.
By night, Romeo is trying to knock down the wall to get the jetpack to stink up the chimneys with his newest invention: the Sniff-O-Whiff. The next day, Connor wanted to play Soccer, but Greg and Amaya don't agree. The Moon-Y Balloon finally flies away when Catboy cuts the rope with the Luna Board. But can Catboy use this to his advantage in time to save the day? But when they got to the park, they discovered that the sports equipment was stolen. Greg and Amaya want Cameron to help clean up Connor's desk, but Connor doesn't want Cameron's help.
Greg then notices tiny Ninjalino footprints on one of Connor's homework sheets. Catboy and Owlette tried to help, but Gekko wants to prove that he's super strong by defeating the Ninjalinos, and getting the sports gear by himself. Owlette got mad at Catboy for not helping her with the plan to stop Romeo. By day, Connor, Greg, Amaya, and Cameron were preparing for the school puppet show when Cameron smells cookies from the cafeteria. Greg is the scorekeeper, and Cameron is the referee. Owlette tries to use Flossy Flash's powers to stop Romeo from reaching the library, and the city's most important books, but she keeps making the mission harder. Gekko flips out, but Owlette comes up with another plan to stop Romeo.
By day, Connor, Greg, and Amaya play soccer against Cameron's team. By night, Luna Girl is using an adapter to her Luna Magnet to make all types of rain clouds to end summer. By night, it is revealed that Night Ninja and his Ninjalinos have stolen the school bus and wants to convert it into his own Super-Vehicle. Gekko's first trick is for Romeo to buy some Ice Cream, but then Gekko steps on another booby-trapped tile that spits out a gigantic boulder. Catboy tries to get Owlette to accept his apology, but Owlette remains adamant that scaring her at the museum was mean, and not funny.
Night Ninja got so mad at Owlette. Then, Connor, Greg, and Amaya were going to the Hot Air Balloon ride, when they notice that the rope was cut. Greg wants to play, but Connor always goes first. Connor wants to see the lions and tigers, but Greg and Amaya want to see the butterfly gardens instead. Greg wants to be strong in the daytime.