In a world where toys have become unpopular, villain Billy Willy sets up a terrifying plot to kidnap YouTubers and blow them into space. One million YouTuber Da-in goes out to find Billy Willy with fastest aircraft Sky to save her kidnapped mother! Can Sky save the Earth with Maximum Speed?

At school, a new student named Kagami catches Adrien's attention, which Marinette is quick to notice. However, Marinette herself meets Luka, who may well sow confusion in her heart… She also meets the Guardian of the Miraculous, Master Fu, and learns about the existence of other Miraculous. Thanks to them, she will be able to occasionally enlist the help of other superheroes of her choice for particularly difficult missions. Finally, she finds out that Hawk Moth has a dreadful plan that he has been working on for a very long time and that he is determined to implement to defeat Cat Noir and her!