
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.
Afraid that Marinette and Adrien's relationship is failing, Nino suggests making them Carapace and Rena Rouge's deputies, unaware that they are already Ladybug and Cat Noir.
When Adrien decides to make a documentary about his father Gabriel Agreste, Marinette does her best to protect her secrets.
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.