By day, Connor, Greg, and Amaya were heading to the playground. Connor says he's finally tall enough to go on the big kids' stuff when Greg notices that the playground has been shrunk. The PJ Masks soon find out that Romeo and Night Ninja team up to shrink them. Catboy says that he's a big kid. But when Romeo and Night Ninja shrink him, Catboy makes the mission harder by complaining that he's so small.