At 22, Marinette Dupain-Cheng and Adrien Agreste, also known as Ladybug and Chat Noir, are juggling a lot. They're a year into their relationship and are both Paris's superheroes and parents to their lively daughter, Emma. Marinette is still dealing with some tough memories from her past encounter with Chat Blanc, which affects her current happiness. Chat Noir doesn't fully know what she's going through or the real reason why she won't let him have Emma outside of being Chat Noir. Things take a turn when Marinette and Adrien, not knowing each other, end up meeting at university. As they start getting closer in their regular lives, Ladybug finds it hard to keep her superhero and personal life separate, worried about keeping Emma safe.