In the day, the trio discovers slow moving people and animals. As the PJ Masks, they discover that Romeo invented a slow motion ray so everyone will be too slow to stop him from conquering the world. But Gekko keeps getting distracted, causing him to be hit by the slow motion ray. He comes up with a plan for Catboy and Owlette to distract Romeo, while he slowly makes his way to destroy the slow motion machine.
At day time, the kids were playing until they notice some new purple balls, however when Cameron and the other kids touched them, they act strange and kept on saying "Moon". At night, Luna Girl was the one who created the Moonfizzle Balls and plans to take over the world together with the Moon-fizzled people. However, when Catboy fools around too fast with the Moonfizzle balls with the tennis rackets instead of collecting them, the balls hit Owlette and Gekko who also become moon-fizzled and Catboy must fix this himself.
At day time, the kids are practicing their soccer skills until they noticed a toy store nearby has sticky splats all over it. At night, Night Ninja and his Ninjalinos are playing their own style of soccer and plan to splat the entire city. When Owlette's feet are stuck in a splat ball, she still wants to play despite her disabled feet but that only makes the mission harder.
The kids are having a picnic in the park while Greg is playing with his pet Lionel until they noticed that Lionel has mysteriously disappeared. At night, it turns out Romeo was feeding Lionel some green pet treats that makes him big and calls him Lionel-Saurus though he also has some red treats that makes him shrink. Unfortunately, Gekko keeps on being defensive on his favorite pet despite Lionel's big size which not only makes the mission harder, but nearly endangered both the PJ masks and the city.
At day time, the kids are going to school with their cuddly pets though Connor knows they're too old already to have those until they noticed that Cameron's sister is upset that she has a talking Romeo doll instead of her own cuddly which makes the kids suspicious. At night, Romeo and Robot were stealing all the cuddly dolls and plan to transform them into cuddly Romeo dolls. But Catboy wasn't the only who feels ashamed for hiding his cuddly from his teammates, even Owlette and Gekko are also ashamed because their cuddly dolls are stolen so they must stop Romeo at all costs despite being kids.
The kids are in the museum looking at all the cat displays and the teacher explains the story about the Night of the Cat which inspires the kids(mostly Connor). At night, the PJ masks become curious about the cat-ability until Luna Girl shows up with her moon energy ball. While they're distracting Luna Girl by pretending to have fun, Catboy tries to unlock the cat-ability but his curiosity makes him forget about his teammates. It turns out to be a trick by Luna Girl because the book was hers, the cat-ability is fake and the 3 cat statues are actually moon statues who traps Catboy in a moon wheel until Catboy creates a plan to use the moon wheel against Luna Girl.
At day time, the kids were practicing their scooter moves until they noticed everyone even the teacher acting like babies. At night, Romeo created a baby beam and plans to take over the world with the baby people. When Catboy and Owlette get zapped, they act like babies and Gekko is having a hard time with the little two-some.
The first night after Night Ninja defeats, Owlette says there's gonna be an eclipse tomorrow which worries Luna Girl because she believes the moon will disappear. The next day, Amaya shows Connor and Greg the telescope and talking about plants in the book, but the moths says to her friends about the moon was eclipse by nighttime which luna powers was off by the moon will disappear. The second night, Luna Girl is losing her lunar power due to the eclipse and Romeo plans to steal Luna Girl's board and lunar magnet for his evil plan. Unfortunately, Owlette and Luna Girl's argument makes the mission harder.
At day time, the kids were talking about their hero stuff until they noticed the crane's wrecking ball mysteriously disappeared. At night, Romeo was the one who took the wrecking ball and plans to turn the whole city into a giant pinball machine. Unfortunately, The PJ masks are having a hard time trying to stop all 3 wrecking balls and underestimated Romeo, until they created a plan on beating him at his own game.
At day time, the kids were walking around until Connor stepped on a bouncing splat which sends him flying into a bush and laughed by Cameron much to his dismay. At night, The PJ masks were following a trail of splats and they spotted Romeo and Robot, who are unhappy because they lost their bounce-a-lot machine. It turns out Night Ninja was the one who took Romeo's machine and uses it to convert their sticky splat into bouncy splat. The PJ masks tries to stop the villains but Catboy keeps on showing off which makes the mission harder.
At day time, everyone is preparing for the carnival parade until they're shocked that the Candy Train has disappeared. At night, Night Ninja and his Ninjalinos were the ones who took the Candy Train and plans to take all the floats. But Night Ninja isn't the only villain they have to deal with, Romeo was the one who instructed Night Ninja to steal the floats and plans to convert them into evil floats. The PJ masks tries to stop them but they're having a hard time because Gekko keeps on being dependent on his favorite float, The Laughing Lizard.
Romeo steals PJ Robot and colors on him. While Gekko and Catboy are cleaning PJ Robot in HQ, Owlette gets lured outside by a Flossy Flash comic, only to be captured by Romeo. Romeo uses a machine to disguise himself as Owlette and shamelessly tries to fool the rest of the heroes with his disguise, angering the other villains along the way.
When Night Ninja steals equipment from Pirate Day at school, Catboy jeopardizes the PJ Masks rescue mission.
PJ Masks investigate Night Ninja when the ninjalinos keep disappearing.
Gekko finds a crystal that gives him powers, but it turns out the powers are too strong.
While Gekko tries to stop the Ninjalinos on his own, Night Ninja tries to take over HQ.