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!

Ladybug and her team face supervillains created by the mysterious new holder of the Butterfly Miraculous.

Ladybug and Cat Noir's enemy is more powerful than ever.

Not only is Marinette Ladybug, the superheroine that protects Paris from the attack of villains, but she’s also now the guardian of the Miraculous. This means that not only does she need to keep her identity hidden, but also the existence of these turbulent, magical creatures, the Kwamis! Marinette has a lot of pressure, not to mention her school and love life! Now she has less time and opportunities to tell Adrien her feelings... Marinette now has to redouble efforts to protect her secrets and Ladybug will have to become stronger to face an indomitable adversary: Shadow Moth, who can now fuse the Butterfly and Peacock Miraculous! Thankfully, Ladybug can count on Cat Noir and their new superhero allies!

Marinette and Adrien's relationship finally takes a cautious step forward, but Kagami -- and the future of Paris -- stand in their way.

Marinette tries to find ways to get closer to Adrien, but Ladybug and Cat Noir have their hands full with the akumatizing havoc wreaked by Hawk Moth.