Story

The Backstory
Freddy Fazbear's Pizza used to be a popular restaurant for adults and kids. However, due to many incidents - including the missing kids. A man lured kids backstage using a costume related to Freddy Fazbear's. (The main mascot of the pizzeria.) The Health Department coming after many reports of the animatronics having a "rotting odor". (Blood and mucas in and around their eyes and mouths.)  Lastly, the Bite of '87. (someone waas bit by one of the animatronics and lost their frontal lobe of their brain.) The pizzeria went through somebad times. Freddy Fazbear's Pizza is going to be closed down by the end of the year, because no-one wants to be at a tainted restaurant with very horrible reputation.

The four mascots - Freddy Fazbear, Chica the Chicken, Bonnie the Bunny, snd Foxy the Pirate Fox - have a foul stench that parents complained about "reanimated carcasses". The Phone Guy says in the 1st Night phone message that the animatronics have not had a bath since their 20+ years of service, which would explain the nasty smell. There have been rumors that the kids who have been kidnapped, were stuffed in the animatronics, for which that explains the smell.

Due to the risk of of their servos locking up from no-use, at night, the animatronics have been left in "free roaming mode" at night for a couple of years. They were able to freely roam in the day, but the Bite of '87 caused the pizzeria to stop that action.

The Phone Guy has sadly been captured, as heard on the 4th night phone messaged, and is said to be stuffed in a suit. Many theories say what happens to him, but we know for sure that he was captured.

There is a theory about a more complicated and twisted version of the plot, due to the message heard on Night 5.