In 1973
You will play as Henry Stillwater, the founder of Fredbear's and the man with a vision. Working together with Afton Robotics to make a restaurant that the whole family can enjoy. Sadly your night-guard quit without any rhyme or reason, he just failed to show up one day. So until you find a replacement you take the job yourself. It's only then you start seeing the truth of what the man behind the robots has been doing.
In 2017
You play Max Donovan, a paranormal investigator who's gotten an anonymous tip about the sudden disappearance of Henry Stillwater. You go to the abandoned Fredbear's location to try and find the truth, not knowing something restless is out there, and it wants to show you the truth of everything what happened, and to save them.