Due to lack of money, you had to get a job as a night security guard at Freddy Fazber's pizzeria.

Now it was the third night you worked there. You put on a Freddy mask to scare away the Mangle in the ventilation, when suddenly you hear a strange rumble... And you realize that you forgot to start the music box that held the Puppet. Opening the tab with the video from the surveillance cameras, you see that the box is open, but there is no puppet inside.

He's probably halfway there by now.