Polite Society is the story of British-Pakistani teenager Priya Kansara. She goes to an expensive London private girl’s school, where she’s got two best buds—Seraphina Beh and Ella Bruccoleri—and a nemesis—Shona Babayemi. Complicating matters is Kansara’s passion for martial arts stunt work. It leads to lots of fighting, which quickly reveals Polite’s major conceit: Kansara’s…