Season two mainly takes place in the Briarcliff Mental Instituion in 1964. The place treats the mentally and criminally insane and is run by Sister Jude (the boss lady who is one of the those hardcore, self-righteous mean jerks) and Sister Mary Eunice (an airheady but sweet lady). Psychiatrist Dr. Oliver Thredson and scientist Dr. Arthur Arden also work with the patients there. And of course, everyone in the joint claims they are innocent and in fact, many are.
As the season goes on, you learn all about each character's past and current life. And with each episode, the place becomes crazier. You have a Satan-possessed nun, aliens, a Nazi mad scientist who makes new species of humans, a secret serial killer and a bunch of other whacked out stuff, so naturally, some of the residents formulate a plan to escape. Some times it's a little bit out there and it can get graphic at times but it had me hooked most of the episodes and I went through the entire season in a couple of weeks.
American Horror Story, regardless of the season, is one of the most underrated shows on TV. Since it's on cable, it can push the edge a little bit and each season is full of good acting and a catchy story-line. The below trailer is the trailer for the season but it doesn't have much to do with the actual show but is more symbolic of things that go on.