Alya's anger.

Synopsys: And if the events that took place in the Anansi episode had happened differently. What if Adrien had tried to explain to Nora the difference between fighting an adversary and protecting someone and if Marinette had accused him of cheating and Alya's sister had listened to them and decided not to personally confront Nino on the arm of iron. What if Alya got mad because Nino had an unhappy word. What would have happened?