The DC Super Hero Girls are back in school, where they hone their extraordinary abilities, intelligence, and determination to transform into the heroes of the future. Supergirl’s dramatic entrance into the cafeteria reveals her immense strength, but also highlights her need for growth before she can truly be called a Super Hero. As she works on controlling her powers, the Junior Detective Club delves into a puzzling series of security incidents. Is the reformed villain and current Vice-Principal of Super Hero High, Gorilla Grodd, behind it all, or is there a more sinister force at play?