A hard working security guard, Mike Schmidt, has started a job working as a night guard at Freddy Fazbear's Pizza, a restaurant owned by the fictional "Fazbear Entertainment". Mike's predecessor leaves a voicemail message each night and explains different aspects of the history of the restaurant. He explains that the restaurant's four animatronic characters come to life at night because their servomotors will lock up if they are left off for too long. The employee warns Mike that if one of the animatronics encounters a human after hours, it will automatically assume that the human is an endoskeleton without its costume and that the animatronic will "forcefully stuff" the person into a spare mechanical Freddy Fazbear costume, killing the person in the process.