The PJ Masks arrive on the moon with a guest: Luna Girl. She asks what all this is about, and is surprised to see the control panel filled with birthday party decorations and presents. The team is celebrating her birthday tonight with a surprise moon dance party in their HQ Rocket. Music starts playing, and the PJ Masks and Luna Girl dance, sharing their moves through their powers on the dance floor and then in zero gravity. Luna Girl proclaims this is the best birthday ever, and everyone continues having fun as the short comes to a close.
Celebrating a friend’s birthday every year can make them smile.
This short shows that the PJ Masks were throwing a surprise party for Luna Girl's birthday.
Unlike her picture book counterpart, Luna Girl received presents from the PJ Masks during her birthday, while Sorceline received nothing other than acknowledging that her motive on stealing is her birthday gift.
Gekko calls Luna Girl by her nickname, Luna, for the first time.
The PJ Masks HQ Rocket reveals to have a zero gravity mode button.
This short, along with the next short, may had taken place after the events where Luna Girl had reclaimed the Moon Crystal from the remains of the Mega Magnet to restore her Luna Wand. This may include that the short and "Play Date on the Moon" were produced when Season 4 was in production, even though Kyle Harrison Breitkopf was still voicing Gekko at the time.
It is shown that Luna was invited into HQ for the second time.