A pair of Parisian high schoolers protect their city as vigilante heroes without revealing their identities to anyone, including each other.

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!

Teen Parisian superheroes Ladybug and Chat Noir visit New York on a field trip and discover that superheroes exist in the United States too.