
Marinette seems to be a normal teenage girl -- she dreams of becoming a fashion designer, is a bit awkward and has a crush on a classmate. But she has a secret other teenagers don't have -- she lives a double life as a crime-fighting superhero known as Ladybug. She uses her superpowers to help protect her native Paris from supervillain Hawk Moth. She is assisted, reluctantly, by fellow hero Cat Noir, even though she insists she doesn't need him -- a stance she might not take if she knew his alter ego is her crush, Adrien. Together, Ladybug and Cat Noir help keep Paris safe from Hawk Moth and other villains.

Marinette is convinced Nora and her coworker Twig have feelings for each other but are too afraid to confess, risking their chance at love.

Chloé Bourgeois returns to Paris to film a movie at the school; Sabrina hopes Chloé has changed for the better; Marinette fears the worst; Chrysalis ultimately akumatizes Chloé into Queen of the Dreadzone.

While Adrien wonders how to be as full of surprises as Marinette, Kagami and Felix wonder how to avoid unpleasant surprises.

While Zoe looks for a way to stop ill intentioned people on her path from doing evil, Ladybug is faced with a series of strange events in Paris.