Marinette and Adrien, two Parisian teenagers, are entrusted with powerful jewels in order to transform into superheroes Ladybug and Cat Noir. But neither hero knows the other's true identity — or that they're classmates!
Marinette’s class is headed to New York, the city of superheroes, for French-American Friendship Week. The whole class is there...except Adrien, whose father refuses to let him go!
On school break, Marinette heads to Shanghai to meet Adrien. But after arriving, Marinette loses all her stuff, including the Miraculous that allows her to turn into Ladybug!