You are William Afton after the events of fnaf 6. Somehow, you are sill alive, but barley. You can barley move, so you decide to leave your body entirely. You don't really know what Michael was doing with the fire approach, given most metal is almost entirely fire proof. Almost. Unfortunately for you, the animatronics are still alive, but in a much more terrifyingly mangled form. They can see your blackened soul perfectly fine. You must make it out without detection from any of the animatronics. And if you can't, kill them all again, make them remember exactly why they wanted you dead in the first place.