This game took the internet by storm, people playing it, screaming, and loving it.
My guess from the story is a pizza place with these characters. Freddy Fazbear, Chica the chicken, Bonnie the Bunny, and Foxy the Pirate. Back in the day someone was dressed as one of the characters luring kids to the back to stuff the kids into the character suits. The spirits then possess the suits for years. In the year 1987, Foxy bit the front head of a child, putting him out of order and the pizza place to be in a shady spot with people. Years later, you take the role as a security guard looking after the place while these poltergeist possessed characters try to enter your security room to stuff you in a suit.
The game plays on jump scares, stress, and paranoia. The jump cares are from when you are caught and killed by a character. The stress is the limited power and time you need to get to and win the game. And the paranoia is having two blind spot doorways to check up and close on so you can survive. At the end of all the nights you get a paycheck and regret of ever taking the job.
If you want to work at a place where you get low pay to survive killer pizza mascots in a place that runs on 2 double AA batteries. Then you'll have fun with Five Nights At Freddy's.