I'm not entirely sure specifically which 'A Demon Within' true story you are referring to. There could be many works with such a title. It might be about a person's internal struggle, perhaps with an addiction or a dark psychological state that they experience as if there is a 'demon within' them.
It could be about a person who has an inner 'demon' in a real - life situation. Maybe someone struggling with addiction, and that addiction is like a demon controlling their actions. For example, a drug addict who constantly battles the urge to use drugs, which ruins their life, relationships, and health.
We can't say for sure that 'A Demon Within Based on a True Story' is a horror story. While the presence of a 'demon within' sounds like it could be part of a horror narrative, it could also be a drama or a mystery that just uses that phrase to describe an internal conflict within a character based on real - life events. For example, it could be about a person's struggle with their own dark thoughts or past traumas, which may not necessarily be presented in a traditional horror style.
It might be about a real - life crime where the perpetrator seems to be driven by some sort of inner evil. Like a serial killer who has an insatiable urge to harm others, as if there's a demon inside them pushing them to commit those heinous acts.
As I don't know the exact 'A Demon Within True Story', if it was about someone dealing with a mental health issue, key events might include the first time they noticed symptoms that they later associated with this 'demon within'. It could also include any attempts at getting help, like going to therapy or confiding in a friend. And perhaps there were setbacks, like relapses into the negative behavior or thought patterns that were part of the 'demon within' experience.
I'm not sure specifically which 'A Demon Within Based on a True Story' you are referring to. It could be a book, a movie, or some other form of media. If it's a movie, it might be a horror or thriller based on real - life events that explore the idea of an internal struggle like having a 'demon within' a character, perhaps related to psychological issues or real - life crimes.