An old friend of Master Fu's, Marianne, gets akumatized into Backwarder. Armed with a magic wand, she wants to make up for lost time by stealing it from others! There's not a second to lose for Ladybug and Cat Noir.
Mrs. Mendeleiev gets akumatized into Kwamibuster. She wants to capture Tikki and Plagg to prove to the world that these magic creatures are real. Ladybug and Cat Noir will have to protect their secret at all costs.
Trish gets a job at a spa and invites Ally for some treatments before an upcoming photo shoot. Meanwhile, Austin agrees to pick up Ally’s necklace for her, but things go awry when he drops it in a pot of chilli that Dez is entering in a chilli cook-off.
Trish books an audition for Ally, who discovers she’s performing with an all-girl band and not as a soloist. In attempt to save the day, Austin, Dez and Trish band together and cause a distraction so Ally can sing solo.