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!

After a guardian of magical jewels turns an awkward girl and a popular boy into superheroes, they can never reveal their identities — even to each other.

To save the future from a terrible fate, Marinette becomes Chronobug and teams up with Bunnyx to defeat a mysterious opponent who travels through time. Who is this new supervillain,…