The Last Proof That Slayed Them All - Episode 8

In an exam room, Luna panics when she and her sister Aurora show identical mistakes on their papers. Luna admits she's anxious because Aurora is her sister and she wanted her to do well. With minutes left both girls rush to revise—Luna to protect Aurora, Aurora to avoid being outshone. They hand in their papers. The proctor then reveals the solution includes the long-lost Formula X, impossible for students to crack. Classmates cry foul and Aurora accuses Luna of copying. The proctor orders, "Let's find out who cheated."