Isaac had lived through the many generations of Freddy Fazbear's Pizza, he was intrigued by the mysteries and "ghosts". With his bills needing to be payed, he got a job at the place. He worked as the night shift. Things didn't really work out for him. He went out of his office to make sure that the Toy Foxy animatronic didn't mess with the cameras in the room. That was a mistake. With the bite of 87 having had happened yesterday, this was his last night. The animatronic, or what was left of it, pounced at him, biting into his arm. He ran back towards the office, and just barely made it. He survived the rest of that night, and got his pay.
He was hired again to work at the new place, as he still needed money. He made many friends there. Shodewn, Ty, Foxie, Kyle, Lucas and many more. He now watches over his step son, Ty secretly, prepared to do anything to protect him.