Adrien discovers a book in his father's safe with pictures of the different Miraculous heroes and steals it to learn more. Later, a new student named Lila arrives who claims to be good friends with Ladybug in order to wow Adrien. Jealous and upset by Lila's lies, Marinette begins to tail her, during which time she watches Lila steal the Miraculous book from Adrien. Tikki notices the cover