Set in modern-day Paris, teenagers Marinette Dupain-Cheng and Adrien Agreste transform into superheroes when evil arises. Marinette transforms into her superhero persona Ladybug, while Adrien transforms into his superhero persona Cat Noir, using magical jeweled objects known as the "Miraculous". Not knowing each other's true identities, the two work together to protect Paris from the mysterious villain Hawk Moth, who covets and attempts to steal their powers by using his "akuma", butterflies infused with negative energy, to transform Paris' everyday citizens into supervillains, through a negative emotion that they have recently felt or are feeling.