American Horror Story is a series that, every season , tells a new story centered on a theme and almost the entire cast of the previous season playing new and completely different characters.
In the first season , the theme was a haunted house ; The second , entitled "Asylum " , a judicial madhouse ; the third , which was named " Coven " is a group of witches ; and fourth, "Freak Show", was a circus " freaks " in the 1950s.