The Pesky Posts

S1, E9: As Binny arrives at school, she notices that all of the students, including Luca, are staring into their cell phones, apparently watching a funny video. A mysterious “Big X” has sent the video to all the students: it shows Matze, another student there, making a fool of himself. Nobody knows who’s behind Big X. A short time later, Luca also receives a distressing photo of herself from Big X,. Big X demands money from her, otherwise he threatens to send the photo to the rest of the school. Binny and Melchior decide to take the case and find out who is behind this malicious campaign.