Aftermath of Five Night's at Freddy's.

William Afton and Henry Emily opened a restaurant around the early 70s, named Fredbear's Family Diner, which quickly evolved into a chain of restaurants known as "Freddy Fazbear's Pizza," started in 1983, under the company of Fazbear Entertainment, Inc. At some point, both of them left the company, with an unknown individual taking over as CEO.

William was secretly a serial killer, using mascot costumes to lure, abduct, and murder kids. His motives aren't known, though widely speculated to be him trying to achieve immortality through researching the paranormal, haunted metal (known as remnant), which he created through the murders.

His first target was Charlotte Emily, the daughter of Henry. She became the Marionette, a ghost who took care of and helped awaken the other lost souls.

In 1983, William's younger son also died in an incident, at the fault of his eldest — Michael. The younger son, known as Evan's fate is though often speculated to be connected to either Golden Freddy (an enigmatic spirit taking the form of a yellow bear) or helping Charlie with saving other souls. "I will put you back together" was the last thing said to Evan by his Fredbear plush.

In 1985, William killed 2 kids, and 3 others were later connected to that incident (The Missing Children Incident, or MCI). He was arrested but released due to a lack of evidence. 4 of these kids were Gabriel, Susie, Little Jeremy, and Fritz, going on to haunt Freddy, Bonnie, Chica, and Foxy, respectively, with Susie implied to have been the first to die. The 5th is commonly believed to be named Cassidy, becoming Golden Freddy, though some think it's someone else.

In 1987, William pretended to be a security guard at a new Pizzeria and killed 5 more kids (DCI for short), who went on to be the Toy animatronics. This caused the Bite of '87.

In 1993, Mike worked a shift at the haunted original Freddy's. Later that year, the location was closed, and the company went bankrupt. He later had some sort of nightmares about it and his brother's death, likely paranormal in nature.

At some point, William went to that original Freddy's to destroy the 4 haunted robots, but ghosts manifested, and fearing for his life, he put on the costume he used to kill them. It was actually a part costume part robot hybrid, though, and due to the leaking roof, the machine snapped on him, killing him. He went on to haunt it and/or his corpse inside.

While Freddy's existed, a Sister Location called "Circus Baby's Pizza World" opened. It was a front for William to kill more kids, with the robots there made to kidnap them. It backfired when his daughter sneaked in to see Baby, and it killed her. She then haunted it. William, distraught, locked her and the other robots from there in an underground warehouse where they were rented out for parties. The other robots also got haunted somehow, likely with melted down remnant from some other kids, most likely MCI. Years later, William sent Mike there to find Elizabeth. Thinking he was William, she tricked him, and the Funtime Robots combined into one amalgam of wires, killed Mike, and used his corpse as a skin suit to escape. He quickly rotted, and they had to escape to the sewers. He repossessed his corpse thanks to remnant, though.

Around 30 years after his death (presumably 2023, though that may be debunked now), William was found by Phone Dude, who stole him and put him into his cheap horror attraction based on the Freddy's urban legends, not knowing William was inside the robot. After a few nights, the building burned down, and William escaped. There's also a good ending in that game where Charlie released the other spirits, but its canonicity is "complicated" according to Scott (FNaF creator).

Mike also had a security logbook at some point, where two ghosts, BV and presumably Cassidy (given it's not him), talked about something.

Finally, after like 50 years, Henry re-emerged and made a fake pizzeria, where he called the Funtime robots, now separated from Elizabeth, herself, and William. He also made a robot that captured Charlie. After a bunch of managers failed to collect all 4 robots, Mike came and succeeded. Henry burned them all and himself, with high temperatures now revealed to work on ghosts, apparently. Fazbear Entertainment, Inc. was supposedly closed for good.

But one ghost, very highly implied to be Golden Freddy, though argued as a random never-before-seen 6th MCI kid by some, wasn't ready to let William go, so he kept him from being released and tortured him in super nightmares.

After the incident that transpired, a new pizzeria opened in the middle of the year 2025, where the scars of William Afton, and Fazbear Entertainment still remained. The pizzeria was called Fendrake's pizzeria, and was made by another company that worked with Fazbear Entertainment.

Fendrake: He's a yellow alien animatronic that wears a red tuxedo, which has a golden bow tie. He's the leader of the gang. He also has a microphone, and is the singer for the gang. He also has an orange nose, green hair, a red tophat, green cheeks, and an outgoing personality. This is only his personality in the day time. At night, he's calculating. He has no intent to kill, but needs answers as to why someone would kill him, and his friends.

Andressa: She's an animatronic wolf with short black horns on her head. She wears a purple tuxedo. She is the performer. She can use her pointer finger as a lighter to light birthday cakes. At night, she is calculating, but doesn't hesitate to taunt the night guard. She only wants to kill to avenge her death, not for the thrill.

Marco: Marco is an animatronic fox who plays the electric guitar. He's the guitarist of the gang. He's not very energetic like the others, but he makes sure to help the gang entertain the children. At night, he stalks, making sure he is brought to the night guard. He is also the fastest animatronic, being able to run at 37 miles per hour.

Larry: Larry is an animatronic dragon. He's the pirate that helps entertain the kids with the gang. Although similar to Foxy, he is much less energetic, but is still energetic, but doesn't fail to make the kids have fun. At night, he knows where to find the office. He also has intent on killing for the thrill. But Fendrake stops him to remind him that they need to kill their killer, and not an innocent life.

Lucan: He's the Founder, and CEO of Fendravos entertainment, and the creator of the animatronics.

Luna: She is the first to die out of four who died from food poisoning in the pizzeria, when a former employee poisoned the foods.(She possesses Andressa.)

Tyler: He's the second to die of the food poisoning incident. (He possesses Fendrake)

Markus: He's the third to die of the food poisoning incident. (He possesses Larry.)

George: He's the 4th to die of the food poisoning incident. (He possesses Marco).