AHS Coven tells the secret history of witchcraft in America. 300+ yrs passed since the Salem witch trials; those who escaped now face extinction with escalating mysterious attacks against their kind. Girls are sent to a special school in New Orleans to learn to protect themselves. New arrival Zoe (Farmiga) is harboring a terrifying secret. Alarmed by the aggression, Fiona (Lange), the long-absent Supreme, sweeps back into town to protect the Coven. decimating anyone who gets in her way.