THE_BOSNIAN_KNIGHT
After the death of all the afton's, Henry searches their house to see if William had any remaining animatronics he could salvage and to see if their alive.
after being killed by the nightmares, he finds himself in a new form and after learning his two daughters Charlotte and Charlie are still roaming, he vows to find them, but only ends up falling deeper and deeper into the world of animatronics, spirits and abominations.
( this doesn't follow the original fnaf story, it mixes some of the book stuff with the game's story.)